Citation
Abstract
We examine the power efficiency and decoding complexity of short-block, lowdensity parity-check (LDPC) codes being considered for inclusion in a deep-space telecommand standard. The codes have rate 1/2, blocklengths k ! {64,128,256}, and operate over Galois fields (GF) of order q ! {2,16,256}. We show that codes over GF(16) are ≈ 4 times as complex to decode in return for a 0.6 dB gain in performance and codes over GF(256) are ≈ 44 times as complex to decode in return for a ≈ 1.0 dB gain in performance, all relative to codes over GF(2) at the same blocklength. This provides a quantitative trade-off in selecting a class of codes for a standard.
Details
- Volume
- 42-194
- Published
- August 15, 2013
- Pages
- 1–16
- File Size
- 247.1 KB