Performance of OFDM/MDPSK over Time-Variant Multipath Rayleigh Fading Channels

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概要

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• In this paper, a new expression is derived for the bit error rate (BER) performance of Gray-encoded MDPSK for M = 2 and 4 in orthogonal frequency division multiplexing (OFDM) systems over time-variant and frequency-selective Rayleigh fading channels. We assume that the guard time is sufficiently larger than the delay spread to solve the intersymbol interference (ISI) problem on the demodulated OFDM signal. In this case, the performance depends on the Doppler spread of fading channel. The closed form expression for the bit error probability of MDPSK/OFDM extended from the result in [5] shows that the BER performance of MDPSK is determined by (N+N_G) f_DTs where N is the number of subchannels, N_G the length of the guard interval, f_D the maximum Doppler frequency, and T_s the sampling period. The theoretical analysis results are confirmed by computer simulations for DPSK and QDPSK signals.

• 一般社団法人電子情報通信学会の論文
• 2001-02-01

著者

• Lee Hwangsoo

  The Signal Processing Laboratory Dept.of Electrical Engineering Korea Advanced Institute Of Science

• JWA JeongWoo

  the Signal Processing Laboratory, Korea Advanced Institute of Science and Technology

• Jwa Jeongwoo

  The Signal Processing Laboratory Korea Advanced Institute Of Science And Technology

関連論文

• Frequency and Phase Estimation for Single Sinusoid Using Cyclic Autocorrelation
• Performance of OFDM/MDPSK over Time-Variant Multipath Rayleigh Fading Channels
• Trellis-Coded OFDM Signal Detection with Maximal Ratio Combining and Combined Equalization and Trellis Decoding

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