Title :
Performance of a differential modulation scheme with wireless relays in Rayleigh fading channels
Author :
Zhao, Qiang ; Li, Hongbin
Author_Institution :
Dept. of Electr. & Comput. Sci., Stevens Inst. of Technol., Hoboken, NJ, USA
Abstract :
We develop a new differential amplify-and-forward (DAF) scheme for cooperative wireless relay when the channel state information (CSI) is unknown to any node in the system. For a cooperative system with one source, one relay and one destination node, we derive closed-form expressions of the probability density function (PDF) of the signal-to-noise ratio (SNR) and the average bit error rate (BER) for the proposed DAF scheme. Numerical simulations validate our analytical results. The proposed DAF scheme offers cooperative diversity gain and outperforms the conventional noncooperative differential binary phase shift keying (BPSK) in Rayleigh fading channels.
Keywords :
Rayleigh channels; channel estimation; diversity reception; error statistics; modulation; probability; BER; CSI; DAF; PDF; Rayleigh fading channel; bit error rate; channel state information; closed-form expression; cooperative wireless relay; differential amplify-and-forward scheme; probability density function; Binary phase shift keying; Bit error rate; Channel state information; Closed-form solution; Cooperative systems; Fading; Numerical simulation; Probability density function; Relays; Signal to noise ratio;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399331
