Title :
Modulation and coding for land mobile satellite channels
Author :
Rafferty, W. ; Divsalar, Dariush
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
A summary is presented of the various modulation and coding techniques that have been investigated for 2.4/4.8-kb/s 5-kHz-spaced, land mobile satellite (LMS) channels. Two detection schemes are described which have many inherent advantages due to their common feed-forward processing structure. These are differentially coherent and pilot-aided detection. Based on the channel throughput and bit error rate (BER) performance requirements, i.e. 4.8 kb/s and 10-3 BER at 11 dB Eb/N0, it is shown that rate-2/3, eight-phase-shift-keying (8PSK), trellis-coded modulation (TCM) with data symbol interleaving is the preferred modulation type. The receiver is implemented using differential detection augmented with feed-forward Doppler estimation
Keywords :
encoding; mobile communication systems; modulation; satellite relay systems; telecommunication channels; 2.4 kbit/s; 4.8 kbit/s; 5 kHz; 8PSK; BER; TCM; bit error rate; channel throughput; coding; data symbol interleaving; detection schemes; differentially coherent detection; eight-phase-shift-keying; feed-forward Doppler estimation; feed-forward processing structure; land mobile satellite channels; modulation; pilot-aided detection; receiver; trellis-coded modulation; Bit error rate; Fading; Frequency; Laboratories; Least squares approximation; Modulation coding; Propulsion; Satellite broadcasting; Space technology; Speech;
Conference_Titel :
Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record., IEEE International Conference on
Conference_Location :
Philadelphia, PA
DOI :
10.1109/ICC.1988.13726
