Citation
Abstract
A method is presented for signal-to-noise ratio (SNR) and symbol stream combiner weight estimation. The SNR estimator employs absolute value moments as in an earlier method. The main contribution of this work is that a new algorithm is derived for the combiner weight estimator to remove the large bias at low SNRs. The new algorithm is simulated to combine two independent symbol streams at various SNRs. As an example, in combining two symbol streams at SNRs of -1dB and -7 dB, combiner weight estimates using 1000 samples for the -1 dB stream and 10,000 samples for the -7 dB stream achieve an output SNR of -0.039 dB, which is just 0.012 dB below the theoretical limit achievable with perfect knowledge of the SNRs.
Details
- Volume
- 42-76
- Published
- February 15, 1984
- Pages
- 86–98
- File Size
- 616.6 KB