Title :
On the diversity, bandwidth, and performance of digital transmission over frequency-selective slow fading channels
Author :
Sheen, Wern-Ho ; Tseng, Chun-Chieh ; Wang, Chia-Shu
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
5/1/2000 12:00:00 AM
Abstract :
The issues of diversity reception, bandwidth utilization, and performance evaluation of digital transmission over slowly time-varying frequency-selective fading channels are investigated, with a transmit pulse design that is more general than previously considered. In particular, the tradeoffs among performance, bandwidth, and complexity are addressed. Three types of transmit pulses are considered and compared, including the raised cosine (RC), square-root RC (SRRC), and Gaussian pulses. Union bounds on the symbol and burst error rate are derived for maximum likelihood sequence estimation (MLSE) based on exact pairwise error probabilities for burst-mode transmission. Explicit and implicit diversity are employed to improve the system performance. The results show that the implicit diversity is flexible and easy to exploit and is a good complement to the space or other explicit diversity to further improve the system performance
Keywords :
computational complexity; digital radio; diversity reception; error statistics; fading channels; maximum likelihood sequence estimation; multipath channels; signal synthesis; time-varying channels; Gaussian pulse; MLSE; bandwidth utilization; burst error rate; burst-mode transmission; complexity; digital transmission; diversity reception; exact pairwise error probabilities; explicit diversity; frequency-selective slow fading channels; implicit diversity; maximum likelihood sequence estimation; multipath channel; performance evaluation; raised cosine pulse; square-root raised cosine pulse; symbol error rate; system performance; time-varying fading channels; transmit pulse design; union bounds; Bandwidth; Diversity reception; Error analysis; Frequency diversity; Frequency-selective fading channels; Maximum likelihood detection; Maximum likelihood estimation; Pairwise error probability; Radio frequency; System performance;
Journal_Title :
Vehicular Technology, IEEE Transactions on
