Title :
Performance analysis of an amplify-based differential modulation for wireless relay networks under Nakagami-m fading channels
Author :
Zhao, Qiang ; Li, Hongbin
Author_Institution :
Dept. of Electr. & Comput. Eng., Stevens Inst. of Technol., Hoboken, NJ, USA
Abstract :
This paper examines differential binary modulation for wireless networks that utilize wireless relays to seek cooperative diversity and improved performance over Nakagami-m fading channels. A differential cooperative transmission scheme, referred to as differential amplify-and-forward (DAF), is introduced. The scheme requires no channel state information (CSI) at any node in the system. A differential detection is discussed. A set of analytical results pertaining to the probability density function (PDF) of the instantaneous signal-to-noise ratio (SNR) and average bit error rate (BER) are obtained. The analytical results are confirmed by numerical simulations. It is instrumental to apply the derived closed-from BER expression to evaluate system performance under Nakagami-m fading channels.
Keywords :
Nakagami channels; Rayleigh channels; differential amplifiers; differential detection; diversity reception; error statistics; modulation; performance evaluation; probability; radio networks; BER; DAF; Nakagami-m fading channel; PDF; bit error rate; cooperative diversity; cooperative transmission scheme; differential amplify-forward; differential binary modulation; differential detection; performance evaluation; probability density function; wireless relay network; Bit error rate; Channel state information; Fading; Numerical simulation; Performance analysis; Probability density function; Relays; Signal analysis; Signal to noise ratio; Wireless networks;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2005 IEEE 6th Workshop on
Print_ISBN :
0-7803-8867-4
DOI :
10.1109/SPAWC.2005.1505902
