Title :
Bandwidth-efficient pilot-symbol-aided technique for multipath-fading channels
Author :
Ng, Man-Hung ; Cheung, Sing-Wai
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
fDate :
7/1/2001 12:00:00 AM
Abstract :
Pilot-symbol-aided (PSA) transmission is one of the effective methods to combat multipath-fading in digital mobile communications systems. In the PSA systems, redundant bandwidth and power are required to transmit the pilot symbols. We propose a novel fading estimation technique that requires a very low bandwidth redundancy in the PSA systems. The proposed technique uses simple linear interpolation on the pilot symbols and the detected data symbols to obtain the estimates of the channel fading effects. Monte Carlo computer simulation has been carried out to study the effects of the technique on the bit error rate performance of 16-ary quadrature amplitude modulation in the flat and the frequency-selective Rayleigh-fading channels corrupted with cochannel interference and additive white Gaussian noise. Results have shown that the proposed technique can, at the expense of a little power efficiency, significantly improve the bandwidth efficiency of the PSA systems using receivers with low complexity and latency
Keywords :
AWGN; Monte Carlo methods; Rayleigh channels; cochannel interference; digital radio; digital simulation; error statistics; interpolation; land mobile radio; multipath channels; quadrature amplitude modulation; radio receivers; 16-ary QAM; 16-ary quadrature amplitude modulation; Monte Carlo computer simulation; PSA systems; additive white Gaussian noise; bandwidth efficiency; bandwidth-efficient pilot-symbol-aided transmission; bit error rate performance; cochannel interference; data symbols detection; digital mobile communications systems; fading estimation; flat fading channels; frequency-selective Rayleigh-fading channels; linear interpolation; low bandwidth redundancy; low complexity receiver; low latency receiver; multipath-fading channels; power efficiency; redundant power; Bandwidth; Bit error rate; Computer simulation; Fading; Frequency; Interpolation; Mobile communication; Monte Carlo methods; Quadrature amplitude modulation; Redundancy;
Journal_Title :
Vehicular Technology, IEEE Transactions on