Adaptive Modulation for Space-Time Trellis Coded Multiple Input Multiple Output Systems with Imperfect Channel State Information
| Author(s) | : | Anusree.L, Prof. (Dr.) Sheeja.M.K |
| Institution | : | Electronics and Communication Department, Sree Chitra Tirunal College of Engineering, Thiruvananthapuram, Kerala, India,anusree_l@yahoo.co.in |
| Published In | : | Vol. 1, Issue 5 — May 2014 |
| Page No. | : | 564-568 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Here it is proposed a novel adaptive transmission scheme for space-time trelliscoded multiple-input multiple-output beamforming systems with imperfect channel stateinformation at the transmitter, of which the signal constellation, total transmit power(temporal power), and power allocation among eigenbeams (spatial power) are jointlyadapted to maximize the average spectral efficiency, subject to a target bit-error-rate and anaverage power constraint. The power allocation over the spatial and temporal domains makesthe traditional approach of partitioning the received signal-to-noise ratio (SNR) inapplicableto the above design problem. By introducing a new variable, called as effective signal-tonoise-to-modulation ratio (ESNMR), we derive a rate-selection policy by partitioning therange of the ESNMR with an optimal set of thresholds. A closed-form temporal powercontrol policy and a simple spatial power allocation algorithm are also obtained. Numericalresults demonstrate that the new adaptive transmission scheme yields a significantperformance gain over existing adaptation systems.
Anusree.L, Prof. (Dr.) Sheeja.M.K, “Adaptive Modulation for Space-Time Trellis Coded Multiple Input Multiple Output Systems with Imperfect Channel State Information”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 1, Issue 5, pp. 564-568, May 2014.
