Title :
Signal design for transmitter diversity wireless communication systems over Rayleigh fading channels
Author :
Guey, Jiann-Ching ; Fitz, Michael P. ; Bell, Mark R. ; Kuo, Wen-Yi
Author_Institution :
Ericsson Inc., Research Triangle Park, NC, USA
fDate :
4/1/1999 12:00:00 AM
Abstract :
Transmitter diversity wireless communication systems over Rayleigh fading channels using pilot symbol assisted modulation (PSAM) are studied. Unlike conventional transmitter diversity systems with PSAM that estimate the superimposed fading process, we are able to estimate each individual fading process corresponding to the multiple transmitters by using appropriately designed pilot symbol sequences. With such sequences, special coded modulation schemes can then be designed to access the diversity provided by the multiple transmitters without having to use an interleaver or expand the signal bandwidth. The code matrix notion is introduced for the coded modulation scheme, and its design criteria are also established. In addition to the reduction in receiver complexity, simulation results are compared to, and shown to be superior to, that of an intentional frequency offset system over a wide range of system parameters
Keywords :
Rayleigh channels; diversity reception; land mobile radio; matrix algebra; modulation coding; radio receivers; radio transmitters; signal synthesis; PSAM; Rayleigh fading channels; code matrix; coded modulation; frequency offset system; mobile communications; multiple transmitters; pilot symbol assisted modulation; pilot symbol sequences; receiver complexity reduction; signal design; simulation results; superimposed fading process; system parameters; transmitter diversity; wireless communication systems; Decoding; Diversity methods; Fading; Interleaved codes; Modulation coding; Rayleigh channels; Signal design; Switches; Transmitters; Wireless communication;
Journal_Title :
Communications, IEEE Transactions on