Raju, M. Surendra ; Ramesh, A. ; Chockalingam, A. (2003) BER analysis of QAM with transmit diversity in Rayleigh fading channels In: IEEE Global Telecommunications Conference, 2003. GLOBECOM '03, 1-5 December 2003, San Francisco, USA.
Full text not available from this repository.
Official URL: http://ieeexplore.ieee.org/document/1258317/
Related URL: http://dx.doi.org/10.1109/GLOCOM.2003.1258317
Abstract
In this paper, we present a log-likelihood ratio (LLR) based approach to analyze the bit error rate (BER) performance of quadrature amplitude modulation (QAM) on Rayleigh fading channels without and with transmit diversity. We derive LLRs for the individual bits forming a QAM symbol both on flat fading channels without diversity as well as on channels with transmit diversity using two transmit antennas (Alamouti's scheme) and multiple receive antennas. Using the LLRs of the individual bits forming the QAM symbol, we derive expressions for the probability of error for various bits in the QAM symbol, and hence the average BER. In addition to being used in the BER analysis, the LLRs derived can be used as soft inputs to decoders for various coded QAM schemes including turbo coded QAM with transmit diversity, as in high speed downlink packet access (HSDPA) in 3G.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Source: | Copyright of this article belongs to Institute of Electrical and Electronics Engineers. |
| ID Code: | 102448 |
| Deposited On: | 26 Mar 2017 14:10 |
| Last Modified: | 26 Mar 2017 14:11 |
Repository Staff Only: item control page
