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| Content Provider | IET Digital Library |
|---|---|
| Author | Janarthanan, Subhashini Bhaskar, Vidhyacharan |
| Abstract | In this research work, the authors derive closed-form expressions for capacity per unit bandwidth (spectrum efficiency) of correlated Rayleigh fading channels under maximal ratio combining diversity at low signal-to-noise ratios (SNRs). Spectrum efficiency expressions are derived for M diversity branches under adaptation policies, such as: (i) optimal power and rate adaptation (OPRA) policy, (ii) optimal rate adaptation (ORA) policy and (iii) truncated channel inversion with fixed rate (TIFR) policy. Even at low SNRs, if space diversity is exercised using a single-input multiple-output system, spectrum efficiency achieved is higher compared with that achieved when signals are uncorrelated and have no diversity. This forms the focal point of this study. Analytical results show accurately that OPRA policy provides highest capacity over other adaptation policies. The spectrum efficiency for the three policies and outage probability for the low SNR case are derived, plotted and analysed in detail in this work. |
| Starting Page | 745 |
| Ending Page | 754 |
| Page Count | 10 |
| ISSN | 17518628 |
| Volume Number | 7 |
| e-ISSN | 17518636 |
| Issue Number | Issue 8, May (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/7/8 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2012.0647 |
| Journal | IET Communications |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Channel Capacity Correlation Theory Diversity Reception Maximal Ratio Combining Diversity MIMO Communication OPRA Policy Optimal Power And Rate Adaptation Optimal Rate Adaptation ORA Policy Outage Probability Probability Radio Link And Equipment Rayleigh Channel Rayleigh Fading Channel Capacity Analysis Signal Processing And Detection Signal to Noise Ratio Regime Single Input Multiple Output System Space Diversity Spectral Analysis Spectrum Efficiency Statistics TIFR Policy Truncated Channel Inversion with Fixed Rate |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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