Threaded Space Time Code Design for CPM with Joint Decoding

2014 ◽  
Vol 631-632 ◽  
pp. 847-850
Author(s):  
Guo Wei Lei ◽  
Yuan An Liu ◽  
Xue Fang Xiao
Keyword(s):  
Phase Modulation ◽  
Multiple Input Multiple Output ◽  
Continuous Phase ◽  
Space Time ◽  
Continuous Phase Modulation ◽  
Code Design ◽  
Time Code ◽  
Soft Decoding ◽  
Multiple Input ◽  
Input Multiple Output

In the letter, a system of continuous phase modulation (CPM) with threaded space time codes (TSTC) is proposed for multiple-input multiple-output systems. In the system, source bits are coded via outer coder of Reed Solomon (RS). The codeword of which is suitable for TSTC design. Then inner coder mainly converts binary symbols into M-ary symbols for purpose of CPM. At receiver, Joint soft decoding approach is considered. Finally simulation results are provided for VBLAST, DBLAST, and TSTC as comparison.

scholarly journals A wireless MIMO CPM system with blind signal separation for incoherent demodulation

2008 ◽  
Vol 6 ◽  
pp. 101-105
Author(s):  
O. Weikert ◽  
U. Zölzer
Keyword(s):  
Multiple Input Multiple Output ◽  
Continuous Phase ◽  
Signal Separation ◽  
Mimo Channel ◽  
Continuous Phase Modulation ◽  
Blind Signal Separation ◽  
Blind Signal ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Efficient Transmission

Abstract. A multiple-input multiple-output (MIMO) wireless transmission system with continuous phase modulation (CPM) is considered. A novel MIMO CPM receiver with incoherent modulation is presented. The incoherent demodulation of CPM allows an uncomplicated handling of a frequency offset compared to coherent approaches requiring exact knowledge of the carrier frequency. Blind signal separation (BSS) is applied in the proposed MIMO CPM receiver to separate the signals without any knowledge of the MIMO channel. The BSS permits the demodulation of each separated signal by an incoherent CPM demodulator. For bandwidth efficient transmission partial response CPM and non-binary modulation is applied. The applicability of the proposed system is verified by simulation results.

Distributed Space-Time Continuous Phase Modulation Code Design

2008 ◽  
Vol 7 (11) ◽  
pp. 4455-4461 ◽  
Author(s):  
Anna-Marie Silvester ◽  
Lutz Lampe ◽  
Robert Schober
Keyword(s):  
Phase Modulation ◽  
Continuous Phase ◽  
Space Time ◽  
Continuous Phase Modulation ◽  
Code Design ◽  
Modulation Code

scholarly journals A Janus compatible software-defined underwater acoustic multiple-input multiple-output modem

2021 ◽  
Vol 17 (4) ◽  
pp. 155014772110106
Author(s):  
Surinder Singh ◽  
Mark Crispo ◽  
Jean-François Bousquet ◽  
Shadi Aljendi
Keyword(s):  
Transmission Rate ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Continuous Phase ◽  
Space Time ◽  
Transmission Mode ◽  
Time Block ◽  
Space Time Block Code ◽  
Multiple Input ◽  
Input Multiple Output

This article describes the implementation of a multiple-input multiple-output acoustic communication link in shallow water conditions to enable a software-defined acoustic modem with a maximum transmission rate of 20 kbps in a 5-kHz bandwidth. The reliability improvement of a low-complexity Alamouti space–time block code is evaluated to improve the diversity in a high-rate transmission mode using single carrier modulation, as well as in a low-rate transmission mode relying on continuous-phase frequency-shift keying. Using measurements in realistic subsea conditions, the effect of the spatial channel correlation is demonstrated. It is found that for the space–time block code/continuous-phase frequency-shift keying, the spatial diversity is significantly degraded due to the high spatial correlation. In contrast, for the high-mode transmission rate, space–time block code with single carrier modulation offers a bit error rate improvement by a factor over hundred, in comparison to a single transmit element, demonstrating that the multiple-input multiple-output optimal code depends on the software-defined acoustic modem transmission mode.

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