Performance of Coherent Receivers with Hybrid SC/MRC over

Nakagami-m Fading Channels

Advisor:王瑞騰Student:李昌穆

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL.48,NO.4,JULY 1999

Outline

Introduction Joint Statistics of The Hybrid SC/MRC

Receiver Output Average BER of Hybrid SC/MRC Binary

Receivers Numerical Examples & Discussions Conclusions References

Introduction

Performance analysis of two hybrid SC/MRC diversity receivers over Nakagami-m fading channels .

Numerically compared with that of the conventional SC and MRC schemes.

Selective Combining

Maximal Ratio Combining

Joint Statistics of The Hybrid SC/MRC Receiver Output

Average BER of Hybrid SC/MRC Binary Receivers

g =1 for coherent BPSKg = 0.5 for coherent orthogonal BFSKg =0.715 for coherent BFSK with minimum correlationTotal SNR :

Average BER of SC/MRC-2/3 Binary Receivers

Average BER of SC/MRC-2/4 Binary Receivers

Numerical Examples & Discussions

Numerical Examples & Discussions

Numerical Examples & Discussions

Numerical Examples & Discussions

Conclusions

The BER degradation arising from the use of hybrid SC/MRC instead of MRC is independent of the average SNR regardless of the severity of the fading.

MRC provides a higher rate of improvement than the hybrid SC/MRC as the severity of fading decreases.

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2001 David Tse 、 Pramod Viswanath , Fundamentals of

Wireless Communication , Cambridge , 2005