Title :
On diversity reception of narrow-band 16 STAR-QAM in fast Rician fading
Author :
Tjhung, Tjeng Thiang ; Dong, Xiaodai ; Adachi, Fumiyuki ; Tan, Kang Hai
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
fDate :
11/1/1997 12:00:00 AM
Abstract :
An expression for the bit-error rate (BER) of 16 STAR-quadrature amplitude modulation (QAM) with differential encoding and detection in a Rician fading channel with diversity reception is obtained. Two types of intermediate frequency (IF) filters are considered in the analysis: the intersymbol interference (ISI)-free matched and nonISI-free Gaussian filters. BER curves for various ratios of the line-of-sight (LOS) power to the multipath power, Doppler spread frequencies, and orders of diversity are presented. It is shown that 16 STAR-QAM outperforms 16 DPSK under the same power-limited condition. For the Gaussian receive filter, a filter bandwidth of about 1.2 times the symbol rate is found to lead to a minimum error probability prior to the appearance of error-rate floors
Keywords :
Doppler effect; Rayleigh channels; Rician channels; band-pass filters; coding errors; diversity reception; encoding; error statistics; fading; filtering theory; intersymbol interference; land mobile radio; matched filters; probability; quadrature amplitude modulation; radiofrequency filters; radiofrequency interference; 16 DPSK; BER curves; Doppler spread frequencies; Gaussian receive filter; ISI-free matched filters; LOS power; bit error rate; differential detection; differential encoding; diversity order; diversity reception; fast Rician fading channel; filter bandwidth; intermediate frequency filters; intersymbol interference; line of sight power; minimum error probability; mobile radio; multipath power; narrowband 16 STAR-QAM; nonISI free Gaussian filters; power limited condition; quadrature amplitude modulation; symbol rate; Amplitude modulation; Bit error rate; Differential quadrature phase shift keying; Diversity reception; Frequency diversity; Intersymbol interference; Matched filters; Narrowband; Quadrature amplitude modulation; Rician channels;
Journal_Title :
Vehicular Technology, IEEE Transactions on
