Abstract
m-ary code shift keying is a form of combined coding and modulation, recently introduced, which promises significant coding gains. It can be considered as an extension of binary code shift keying (CSK), which is sometimes used in direct-sequence spread spectrum (DS-SS). Binary CSK uses two different pseudo random binary codes in order to transmit data '1' or '0'; m-ary code shift keying (mCSK) uses m different codes, which may not necessarily be binary. It is shown that the optimum codes for mCSK have constant signal energy non-ideal realisable codes are described, and their performance compared with the limit. The ideal structure will provide a suitable starting point in the search for good realisble codes, and the search will be based on geometry, rather than on the more conventional algebraic coding theory.
| Original language | English |
|---|---|
| Pages (from-to) | 67-72 |
| Number of pages | 6 |
| Journal | IEE Conference Publication |
| Issue number | 300 |
| Publication status | Published - 1989 |
| Event | Second IEE National Conference on Telecommunications - Heslington, Engl Duration: 2 Apr 1989 → 5 Apr 1989 |