Title :
An efficient multirate FDM demultiplexer for satellite communication systems
Author :
Weiguan, Xiang ; Guoan, Bi ; Po-ching, Liu
Author_Institution :
Nanyang Tech. Univ., Singapore
Abstract :
A new generation of “user-oriented” satellites with regenerative, on-board processing FDMA/TDM (frequency division multiple access and time division multiplexing) payloads has been proposed. A multicarrier demodulator (MCD) is required to interface the FDMA in the uplink and the TDM in the downlink. This paper presents the design of a polyphase-filter-FFT-bank (PFFB) demultiplexer as an efficient method for demultiplexing frequency slotted channels. It focuses on the analysis and evaluation of the system performance against the finite-word-length noise introduced in the fixed-point realization of the PFFB. The system signal-to-noise-ratio (SNR) and bit-error-rate (P e) are drawn from the finite precision simulations
Keywords :
band-pass filters; demodulators; demultiplexing equipment; error statistics; fast Fourier transforms; filtering theory; frequency division multiple access; frequency division multiplexing; satellite communication; FDMA/TDM payloads; SNR; bit error rate; demultiplexing; downlink; finite precision simulations; finite wordlength noise; fixed point realization; frequency division multiple access; frequency slotted channels; interface; multicarrier demodulator; multirate FDM demultiplexer; performance evaluation; polyphase filter FFT bank; regenerative onboard processing payloads; satellite communication systems; signal to noise ratio; system performance; time division multiplexing; uplink; user oriented satellites; Demodulation; Demultiplexing; Downlink; Frequency conversion; Frequency division multiaccess; Frequency division multiplexing; Payloads; Satellites; Signal to noise ratio; Time division multiplexing;
Conference_Titel :
Networks, 1995. Theme: Electrotechnology 2000: Communications and Networks. [in conjunction with the] International Conference on Information Engineering., Proceedings of IEEE Singapore International
Print_ISBN :
0-7803-2579-6
DOI :
10.1109/SICON.1995.526343
