Title :
An efficient 4-level coded-CPM modem for a wireless local area network-coded-QPTM
Author :
Horikoshi, Jun ; Oku, Takayuki ; Kimura, Kazunori
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Japan
Abstract :
A new modulation scheme, named coded-QPTM (quatenary phase transition modulation) is proposed for a local-area wireless network (wireless LAN) application. Coded-QPTM is essentially a continuous phase modulation scheme and encoding is executed under the principle of block coding to enlarge the modulated signal distance for Viterbi sequence estimation. A simple (10,9) code can improve the BER performance to almost the same value as that of QPSK. The above characteristics are obtained under the severely band-limited condition
Keywords :
block codes; continuous phase modulation; demodulation; estimation theory; interference suppression; intersymbol interference; maximum likelihood estimation; modems; modulation coding; wireless LAN; 4-level coded CPM modem; BER performance; QPSK; Viterbi demodulation; Viterbi sequence estimation; bandlimited condition; block coding; coded-QPTM; continuous phase modulation; encoding; intersymbol interference cancellation; modulated signal distance; quaternary phase transition modulation; wireless LAN; wireless local area network; Block codes; Continuous phase modulation; Encoding; Modems; Modulation coding; Phase estimation; Phase modulation; Viterbi algorithm; Wireless LAN; Wireless networks;
Conference_Titel :
Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE
Print_ISBN :
0-7803-2509-5
DOI :
10.1109/GLOCOM.1995.502722
