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Topic: Personal Digital Cellular

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Advanced Mobile Phone System

Nordic Mobile Telephone

Global System for Mobile Communications

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Mosler

	Mobile/Cellular Technology - PDC (Personal Digital Cellular) Telephone Technology - Mobile Cellular Voice
		PDC (Personal Digital Cellular) is a second-generation technology used in digital cellular telephone communication in Japan.
		PDC is currently only used in Japan, with the first systems introduced by NTT DoCoMo in 1991 as a replacement for the earlier analog networks.
		PDC is the most spectrally efficient of TDMA technologies, with six half-rate (or three full-rate) channels possible in a 25kHz frequency space, compared to three channels in 30kHz in IS-136 and eight channels in 200kHz for GSM.
	www.mobilecomms-technology.com /projects/pdc (653 words)

	Cellular Networks: Past, Present, and Future
		Cellular radio is the fastest growing segment of the communications industry [1].
		Cellular networks were allocated approximately 50MHz (2*25MHz bands) of radio spectrum by this Conference [1].
		Cellular network operators have to be at the forefront of technology to survive the extremely competitive cellular network environment.
	www.acm.org /crossroads/xrds7-2/cellular.html (5143 words)

	Free Cellular Phones - Glossary (Site not responding. Last check: 2007-09-17)
		In cellular, "alphanumeric memory dial" is a special type of dial-from- memory option that displays both the name of the individual and that individual's phone number on the cellular phone handset.
		Digital transmission offers stronger reception, less static, greater call handling capacity, fewer dropped calls, improved call privacy, and the potential for additional voice and data service such as fax and computer data transmission.
		A digital cellular system that squeezes between 10 and 20 conversations into one cellular channel by combining 30 KHz cellular channels into a single 1.25 MHz channel and using code division multiplexing to combine and recover the individual conversations.
	www.free-cellular-cell-phones.com /glossary.shtml (8361 words)

	Radio-Electronics.Com :: Personal Digital Cellular (PDC)
		PDC was introduced in Japan in 1991 with the move from analogue to digital technology.
		As already mentioned PDC is a TDMA system and it operates by splitting each channel into several time slots and thereby allowing several users to use the same frequency channel.
		Whilst it may appear that the spectral efficiency of PDC would result in a lower level of features, it manages to support many of the expected features including text messaging and caller identification.
	www.radio-electronics.com /info/cellulartelecomms/pdc/pdcsummary.php (697 words)

	Mobile Telephony Protocols: Glossary - a definition from Whatis.com
		Integrated digital enhanced network is a wireless technology from Motorola that combines the capabilities of a digital cellular telephone, two-way radio, alphanumeric pager, and a data/fax modem in a single network.
		Personal communications services refers to wireless phone networks that are similar to cellular telephone networks but emphasize personal service and extended mobility.
		Personal digital cellular is a Japanese standard that uses TDMA.
	whatis.techtarget.com /definition/0,289893,sid9_gci1193741,00.html (1154 words)

	Glossary
		As the cellular telephone user moves from one cell or area of coverage to another, the telephone is effectively passed on to the local cell transmitter.
		When a cellular user is in motion, in a car for example, and travels out of range of the original BST, the BSC acts as a switch and ensures that the call is effectively passed over to the next BTS.
		This enables digital music to be transmitted and stored efficiently within the constraints of a limited bandwidth network, such as in the context of a mobile environment.
	www.cdmatech.com /resources/glossary.jsp (6304 words)

	Glossary of terms (Site not responding. Last check: 2007-09-17)
		Cellular telephone is a type of short-wave analog or digital transmission in which a subscriber has a wireless connection from a mobile telephone to a relatively nearby transmitter.
		A cellular telephone is not to be confused with a cordless telephone (which is simply a phone with a very short wireless connection to a local phone outlet).
		The "personal" in PCS distinguishes this service from cellular by emphasizing that, unlike cellular, which was designed for car phone use with transmitters emphazing coverage of highways and roads, PCS is designed for greater user mobility.
	filebox.vt.edu /users/ahasnat/wireless/glossary.htm (1087 words)

	Heterogeneous Personal Communications Services
		The name "personal communications services" (PCS) is often used as an umbrella term that includes various wireless access and personal mobility services with the ultimate goal of enabling communication, through a small terminal, with a person at any time, at any place, and in any form.
		Although the cellular and the cordless systems have similar architectures, their design guidelines are different (to be elaborated in the next section).
		For example, by integrating a cellular system and a cordless system, the quality of circuits is improved (from the viewpoint of the cellular system) and higher user mobility is supported (from the viewpoint of the cordless system).
	www.comsoc.org /ci/private/1996/sept/lin.html (5506 words)

	An Introduction to Personal Health Records - May 2006 - Family Practice Management
		Personal health records are electronic summaries of a patient’s medical record that are often portable and easily accessed by the patient.
		Personal health records have the potential to improve patient-provider relationships, patient safety and quality of care.
		Personal health records are evolving quickly, so much so that when this article went to press, there was no universally accepted definition of a PHR.
	www.aafp.org /fpm/20060500/57anin.html (2782 words)

	Evolution of Personal Multimedia Communications Services in Japan
		Cellular phone service started in Japan in December 1979, and for the first 10 years the service grew at a slow space.
		This personal number is usually stored on an IC memory card; therefore, one can register the same personal telephone number to one's wired telephone and wireless telephone.
		Similarly, a digital still-picture transmission service, in which pictures taken by electronic cameras can be fed into PCs or printed out on printers via wireless access, is very effective for applications like prompt reporting of news photographs or insurance policy claim assessments (Fig.
	www.comsoc.org /pci/private/1998/dec/Murase.html (5070 words)

	PDC - Personal Digital Cellular, Primary Domain Controller, Professional Developer Conference
		PDC is a acronym that can contains many meanings which are listed below.
		There may be many popular meanings for PDC with the most popular definition being that of Personal Digital Cellular, Primary Domain Controller, Professional Developer Conference
		Personal Digital Cellular is not the only word formed from PDC.
	www.auditmypc.com /acronym/PDC.asp (228 words)

	PERSONAL DIGITAL CELLULAR digital
		A Japanese standard for digital mobile telephony in the 800 MHz and 1500 MHz bands Personal Digital Cellular (Cordless) Personal Digital Cellular uses TDMA and is a digital wireless standard used in Japan.
		The case history of cellular radio, written in 1989 by John W. An excellent essay on the role the FCC had in the development of cellular service.
		Minimizing co-channel interference is a goal in any cellular system, since it allows better service for a given cell size, or the use of smaller cells, thus increasing the overall capacity of the system.
	digilander.libero.it /a_digital/Personal_Digital_Cellular.html (1492 words)

	CIG Facts '96 (Site not responding. Last check: 2007-09-17)
		As a pioneer in cellular telephony, Motorola has demonstrated a strong commitment to wireless communications, beginning with the company's 1971 recommendation of the cellular concept to AT&T and the FCC in the United States.
		Digital Highlights - CIG is active in the development, testing and implementation of digital cellular technologies for every major region in the world.
		ThinCell is an analog cellular base station that accommodates twice the number of radio transceivers without increasing the size of the base station cabinet.
	www.businesswire.com /emk/1492-1.htm (2343 words)

	New Digital Cellular Phone Security Cracked
		The system was supposed to protect the privacy of those dialed digits, but the encryption is weak enough that those digits are accessible to eavesdroppers with a digital scanner.
		Today, most cellular phone calls can be intercepted by anyone in the area listening to a scanner, as House Speaker Newt Gingrich learned this past January when someone with a scanner recorded one of his cellular calls.
		And it's still true that digital cellular systems are much harder to casually eavesdrop on than analog phones.
	www.snapshield.com /www_problems/United_States/New_Digital.htm (787 words)

	[No title]
		The buildout of new infrastructure for digital cellular telephony is at such an early stage that it's impossible to predict what the performance of some of the systems will be.
		The licenses were chosen to fill in the holes in the existing coverage of the four owners, which use CDMA technology in their existing digital cellular systems.
		One of the signs of new life is cellular digital packet data (CDPD) technology, which transmits digital data during the natural silences of conversations.
	www.sunybroome.edu /~dixon_a/info/cellular1.txt (1441 words)

	Personal Digital Cellular - Wikipedia, the free encyclopedia
		The standard was defined by the RCR (later became ARIB) in April 1991, and NTT DoCoMo launched its Digital MOVA service in March 1993.
		PDC uses 25 kHz carrier, 3 time slots, pi/4-DQPSK modulation and low bit-rate 11.2 kbit/s and 5.6 kbit/s (half-rate) voice codecs.
		Compared to GSM, PDC's weak broadcast strength allows small, portable phones with light batteries at the expense of substandard voice quality and problems maintaining the connection, particularly in enclosed spaces like elevators.
	en.wikipedia.org /wiki/Personal_Digital_Cellular (255 words)

	PDC: Personal Digital Cellular (Site not responding. Last check: 2007-09-17)
		Personal Digital Cellular (PDC) is a TDMA-based 2G mobile phone standard developed and used exclusively in Japan.
		PDC uses 25 kHz carrier, 3 time slots, pi/4-DQPSK modulation and low bit-rate 11.2 kbit/s and 5.6 kbit/s (half-rate) voice codecs.
		PDC is implemented in the 800 MHz (downlink 810-888 MHz, uplink 893-958 MHz), and 1.5 GHz (downlink 1477-1501 MHz, uplink 1429-1453 MHz) bands.
	www.javvin.com /wireless/PDC.html (76 words)

	Digital Cellular Technologies Of The World - GSM, Wimax, imode, CDMA2000
		A third generation digital cordless telephone, which is very similar and a precursor to DECT.
		This is because the Federal Communications Commission mandated only that digital cellular in the U.S. must act in a dual-mode capacity with analogue.
		Personal Digital Cellular is a TDMA-based Japanese standard operating in the 800 and 1500 MHz bands.
	www.cellular.co.za /digital_cellular_technologies.htm (1574 words)

	IEC
		Cellular is one of the fastest growing and most demanding telecommunications applications.
		The concept of cellular service is the use of low-power transmitters where frequencies can be reused within a geographic area.
		Cellular systems began in the United States with the release of the advanced mobile phone service (AMPS) system in 1983.
	www.iec.org /online/tutorials/gsm/topic01.html (350 words)

	Digital Cellular Tutorial
		With the use of a digital modulation, other services such as data and fax can also be handled more easily over this system.
		Personal Digital Cellular is the Japanese standard for this area and is TDMA-based, operating in the 800 and 1500 MHz bands.
		Although PDC is continuously under development, the standard has not been adopted by many other countries so far.
	home.comcast.net /~conscriptt/tech/digital.html (1423 words)

	definition of Jdc
		This was a TDMA system used in Japan that was one of Japan's first digital cellular networks.
		However, the JDC system had 3 cellular conversations sharing a single frequency instead of 8 cellular conversations per frequency as GSM and iDEN do.
		Japan later called this system PDC - for Personal Digital Cellular - in the hopes that the standard would be used more internationally also outside Japan.
	www.about-wireless.com /terms/jdc.htm (98 words)

	Digital Wireless Basics: "1990s"
		Cellular telephone deployment is now world wide, but development remains concentrated in three areas: Scandinavia, the United States, and Japan.
		Built on an earlier proposal, this code-division multiple access or CDMA based system would be all digital and promised 10 to 20 times the capacity of existing analog cellular systems.
		PCS or Personal Communication Services were all digital, using TDMA routines and also code division multiple access or CDMA.
	www.privateline.com /mt_digitalbasics/2006/01/1990s.html (1233 words)

	Security In Wireless Cellular Networks
		Cellular Networks have been around since the 1980s and each year their subscribers increase at a very fast rate.
		Authentication: Cellular networks have a large number of subscribers, and each has to be authenticated to ensure the right people are using the network.
		Cellular Networks are open to attacks such as DOS, channel jamming, message forgery etc. Therefore, it is necessary that security features are provided that prevent such attacks.
	www.cse.wustl.edu /~jain/cse574-06/ftp/cellular_security/index.html (5084 words)

	fusionOne: Advertising Opportunities
		It is more prone to interference, static, eavesdropping and cloning than digital systems, but is still deployed in many parts of the world where the advanced technology (and higher cost) of digital systems is not deemed necessary.
		Digital: The newest form of wireless communications that takes all voice transmissions and converts them to computer language (zeros and ones, or "binary" language) and then reconstructs them into the original voice format at the other end.
		DSP (digital signal processor): A specialized microprocessor that performs mathematical operations on a data stream in real time to produce a second (modified) data stream.
	www.fusionone.com /partner/advertising/wireless_glossary.html (648 words)

	CSD April 2000 Feature: Data Over Cellular: A Look at GPRS
		The GSM digital cellular standard is well-entrenched in most of the world.
		Industry analysts predict that over half the cellular phones sold in the world in 2000 will be GSM, with the remainder divided among IS-95 code division multiple access (CDMA), IS-136 time division multiple access (TDMA), personal digital cellular (PDC) (in Japan only), and analog systems such as the AMPS system used in the US.
		Second-generation (digital) cellular networks such as GSM, IS-95 CDMA, IS-136 TDMA, and PDC would seem to have a natural advantage in transmitting data due to their digital nature.
	www.commsdesign.com /main/2000/04/0004feat2.htm (3293 words)

	Cellular Telemetry
		It operates in the 800 and 1900 MHz band in the United States and is the most widely distributed analog cellular standard.
		Older cellular technology found mainly in Germany and Austria.
		The PCS frequency band iin America is 1850 to 1990 MHz, encompassing a wide range of new digital cellular standards like N-CDMA and GSM 1900.
	www.stevenswater.com /telemetry_com/AnalogDigitalCell_table.html (736 words)

	PDC - PERSONAL DIGITAL CELLULAR - funSMS.net
		Personal Digital Cellular (PDC) is a 2G mobile phone standard developed and used exclusively in Japan.
		PDC uses 25 kHz carrier, 3 time slots, pi/4-DQPSK modulation and low bit-rate 11.2 kb/s and 5.6 kb/s (half-rate) voice codecs.
		PDC has 61.817 million subscribers as of end December 2003 but is slowly being phased out in favor of 3G technologies like W-CDMA and cdma2000.
	www.funsms.net /pdc.htm (401 words)

	Cellular Industry GSM Software (Site not responding. Last check: 2007-09-17)
		As defined by the cellular industry: In short is used to describe a mobile phone that is safe for use around flammable materials.
		A phone connection using MSS is similar to a cellular telephone link, except the repeaters are in orbit around the earth, rather than on the surface.
		A technology used in digital cellular telephone communication that divides each cellular channel into three time slots in order to increase the amount of data that can be carried.
	www.cellularindustry.com /popular_cellular_terms_defined.htm (2665 words)

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