BPSK and QPSK non-linear satellite communication system performance in the presence of cochannel interference

2003 ◽  
Vol 21 (3) ◽  
pp. 285-297 ◽  
Author(s):  
Mihajlo C. Stefanovic ◽  
Goran T. Djordjevic
Keyword(s):  
Communication System ◽  
System Performance ◽  
Satellite Communication ◽  
Cochannel Interference ◽  
Satellite Communication System ◽  
Communication System Performance ◽  
Non Linear

Design and Improving Techniques for Uplink Reference Signal in LTE Compatible Mobile Satellite Communication System

2012 ◽  
Vol 588-589 ◽  
pp. 876-879
Author(s):  
Ying Si ◽  
Ya Dan Zheng ◽  
Shu Bo Ren ◽  
Jian Jun Wu
Keyword(s):  
Communication System ◽  
System Performance ◽  
Satellite Communication ◽  
Reference Signal ◽  
Satellite Communication System ◽  
Multiple Beam ◽  
Receive System ◽  
Mobile Satellite ◽  
Mobile Satellite Communication ◽  
Lte Uplink

Reference Signal (RS) is used for channel estimation and sounding in LTE uplink of terrestrial system to accomplish data demodulation. However, the situation in multiple-beam mobile satellite communication system is different. The Uplink Reference Signal (UL-RS) designed in terrestrial LTE doesn’t fit the satellite environment and may result to system performance degradation. In this paper, the UL-RS pattern used in GEO multiple-beam mobile satellite communication system is proposed, as well as two enhancement techniques, i.e., full bandwidth sounding, retransmit and combined receive. System performance index calculation and simulation results prove the effectiveness of the proposed design.

scholarly journals Combination of High-Order Modulation and Non-Binary LDPC Codes over GF(7) for Non-Linear Satellite Channels

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1396 ◽  
Author(s):  
Yanyan Liu ◽  
Weigang Chen ◽  
Anguo Wang ◽  
Changcai Han
Keyword(s):  
Communication System ◽  
Satellite Communication ◽  
Additive White Gaussian Noise ◽  
Ldpc Codes ◽  
High Order ◽  
Modulation Scheme ◽  
Satellite Communication System ◽  
Awgn Channel ◽  
Non Linear ◽  
Satellite Channels

High-order modulations are necessary to improve the bandwidth efficiency of the satellite communication system. However, the non-linear characteristic of satellite channels limits the application of high-order modulations. In this paper, we propose a new 7-point constellation which is expected to be effectively applied to the satellite communication system, and combine it with non-binary low-density parity-check (NB-LDPC) codes over Galois field GF(7) to guarantee the reliability of the data transmission. The exact expression for the average symbol error probability (SEP) of 7-order quadrature amplitude modulation (7-QAM) over the Additive White Gaussian Noise (AWGN) channel is derived, and the non-linear distortion over satellite channels is also analyzed. Simulation results reveal that, compared with the traditional 8-order phase-shift keying (8-PSK), the 7-QAM method can achieve about 3 dB gain over the AWGN channel without channel coding at symbol error rate (SER) of 10 - 6 . Moreover, the proposed combined coded modulation scheme also has better SER performance than the NB-LDPC coded 8-PSK modulation scheme over the non-linear satellite channel.

K-band SS/TDMA in Japanese satellite communication system

1982 ◽  
Author(s):  
S. OKASAKA ◽  
M. NAKAMURA ◽  
T. TANAKA ◽  
T. TAKEUCHI ◽  
H. KOMAGATA
Keyword(s):  
Communication System ◽  
Satellite Communication ◽  
Satellite Communication System ◽  
K Band
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