Title :
Detection of OFDM-CPM signals over multipath channels
Author :
Tasadduq, Imran A. ; Rao, Raveendra K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada
Abstract :
A class of orthogonal frequency division multiplexing-continuous phase modulation (OFDM-CPM) signals is introduced in which binary data sequence is mapped to complex symbols using the concept of correlated phase states of a CPM signal. Canonical optimum and suboptimum multiple-symbol-observation OFDM-CPM receivers are derived. Multipath channel with AWGN is assumed. The receivers are analyzed for bit-error-rate (BER) performance in terms of highand low-SNR bounds. These bounds are illustrated as a function of parameter h, time delay and attenuation level. It is shown through numerical computation that the OFDM-CPM system outperforms a similar OFDM-PSK system in a two-ray multipath model. Moreover, an OFDM-CPM system gives the best error performance when the parameter h is 0.5 with an observation interval of 2.
Keywords :
AWGN; OFDM modulation; continuous phase modulation; delays; error statistics; multipath channels; radio receivers; signal detection; AWGN; BER performance; OFDM-CPM signal detection; OFDM-CPM system; OFDM-PSK system; attenuation level; binary data sequence; bit error-rate; continuous phase modulation; correlated phase states; high-SNR bound; low-SNR bound; multipath channel; multipath channels; observation interval; optimum multiple-symbol observation receivers; orthogonal frequency division multiplexing; suboptimum multiple-symbol observation receivers; time delay; two-ray multipath model; AWGN; Bit error rate; Continuous phase modulation; Delay effects; Educational institutions; Fading; Multipath channels; OFDM; Performance analysis; Signal detection;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.997129