By Ke-Lin Du, M. N. S. Swamy
This practically-oriented, all-inclusive consultant covers the entire significant allowing concepts for present and next-generation mobile communications and instant networking platforms. applied sciences lined comprise CDMA, OFDM, UWB, rapid and LDPC coding, clever antennas, instant advert hoc and sensor networks, MIMO, and cognitive radios, supplying readers with every little thing they should grasp instant structures layout in one quantity. Uniquely, a close advent to the homes, layout, and choice of RF subsystems and antennas is supplied, giving readers a transparent review of the total instant process. it's also the 1st textbook to incorporate an entire creation to speech coders and video coders utilized in instant platforms. Richly illustrated with over four hundred figures, and with a distinct emphasis on functional and cutting-edge ideas in method layout, instead of at the mathematical foundations, this ebook is perfect for graduate scholars and researchers in instant communications, in addition to for instant and telecom engineers.
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Extra resources for Wireless Communication Systems: From RF Subsystems to 4G Enabling Technologies
In this section, we introduce two architectures of radio transceivers: the super-heterodyne transceiver and the direct-conversion transceiver. 1 Super-heterodyne transceivers Conventional super-heterodyne transceivers The 1G radio systems were analog systems using frequency division multiple access (FDMA). For each user, there is a fixed super-heterodyne transceiver. The received signal is first passed through surface acoustic wave (SAW) filters for image suppression. The filtered signal is low-noise amplified, and is then subject to one or more intermediate frequency (IF) stages (mixing and bandpass filtering) and baseband processing.
IS-136, as a modification of IS-54, uses π/4-DQPSK modulation for the control channels, resulting in a higher control channel data rate for paging and short messaging. IS-136 is not compatible with IS-54. PDC, introduced in 1993, is somewhat similar to IS-54/IS-136. It is a TDMA/FDMA/FDD system with π/4-DQPSK. 1 Roadmap of cellular communications Each carrier is 25 kHz wide, and supports a raw data rate of 42 kbits/s. Each carrier is time-divided into 3 full-rate (6 half-rate) channels. The TIA/EIA IS-95 standard was introduced in 1993, and the IS-95A revision was released in 1995.
0), and 1xEV-DV (Evolution, Data and Voice) standards. 1xEV-DO and 1xEV-DV, together known as IS-856 of TIA/EIA, are both backward-compatible with IS95 and 1x. CDMA2000 1x was first deployed in Korea in October 2000, and 1xEV-DO was launched in Korea in 2002. CDMA2000 1x is four times more efficient than TDMA networks, and has a voice capacity that is twice that of IS-95. It delivers a peak data rate of 144 kbits/s in loaded network, and delivers a peak packet data rate of 307 kbits/s in mobile environments.