Citation
Abstract
We show that MIL-STD shaped offset quadrature phase-shift keying (SOQPSK), a highly bandwidth-efficient constant-envelope modulation, can be represented in the form of a cross-correlated trellis-coded quadrature modulation, a generic structure containing both memory and cross-correlation between the in-phase and quadrature-phase channels. Such a representation allows identification of the optimum form of receiver for MIL-STD SOQPSK and at the same time, through modification of the equivalent I and Q encoders to recursive types, allows for it to be embedded as the inner code of a serial or parallel (turbo-like) concatenated coding structure together with iterative decoding.
Keywords
MIL-STD SOQPSK
shaped offset quadrature phase shift keying
cross-correlated trellis-coded quadrature modulation
Details
- Volume
- 42-154
- Published
- August 15, 2003
- Pages
- 1–16
- File Size
- 165.7 KB