Research on soft demodulation of anamorphic PCM/FM signal under the condition of low SNR

Fu Gang; Dongxu Zhu; Renlong Li; Li Wang

doi:10.4028/www.scientific.net/AMM.532.147

Research on soft demodulation of anamorphic PCM/FM signal under the condition of low SNR

Fu Gang, Dongxu Zhu, Renlong Li, Li Wang

Research output: Contribution to conference › Paper › peer-review

Abstract

Reentry telemetry channel is a special channel in the process of remote sensing, black barrier and multipath effect will cause the PCM/FM telemetry signal-to-noise ratio and frequency selective fading, even break through the traditional demodulation method of demodulation threshold, led to the bit error rate is greatly increased when aircraft fly through the reentry telemetry channel. Aiming at the problem, a sliding length of 1 more Symbol Detection (Multi - Symbol Detection, MSD) demodulation algorithm is studied: the continuous observations of N element signal and local signal for joint Detection, but each time the MSD sentences a MSD earlier with N - 1 element coincidence. In theory, the algorithm can increase the channel gain about 3 db, the simulation and test results verified the effectiveness of the proposed algorithm.

Original language	English
Pages	147-151
Number of pages	5
DOIs	https://doi.org/10.4028/www.scientific.net/AMM.532.147
Publication status	Published - 2014
Event	2013 3rd International Conference on Mechatronics and Applied Mechanics, ICMAM 2013 - Duration: 27 Dec 2013 → …

Conference

Conference	2013 3rd International Conference on Mechatronics and Applied Mechanics, ICMAM 2013
Period	27/12/13 → …

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title = "Research on soft demodulation of anamorphic PCM/FM signal under the condition of low SNR",

abstract = "Reentry telemetry channel is a special channel in the process of remote sensing, black barrier and multipath effect will cause the PCM/FM telemetry signal-to-noise ratio and frequency selective fading, even break through the traditional demodulation method of demodulation threshold, led to the bit error rate is greatly increased when aircraft fly through the reentry telemetry channel. Aiming at the problem, a sliding length of 1 more Symbol Detection (Multi - Symbol Detection, MSD) demodulation algorithm is studied: the continuous observations of N element signal and local signal for joint Detection, but each time the MSD sentences a MSD earlier with N - 1 element coincidence. In theory, the algorithm can increase the channel gain about 3 db, the simulation and test results verified the effectiveness of the proposed algorithm.",

author = "Fu Gang and Dongxu Zhu and Renlong Li and Li Wang",

year = "2014",

doi = "10.4028/www.scientific.net/AMM.532.147",

language = "English",

pages = "147--151",

note = "2013 3rd International Conference on Mechatronics and Applied Mechanics, ICMAM 2013 ; Conference date: 27-12-2013",

}

TY - CONF

T1 - Research on soft demodulation of anamorphic PCM/FM signal under the condition of low SNR

AU - Gang, Fu

AU - Zhu, Dongxu

AU - Li, Renlong

AU - Wang, Li

PY - 2014

Y1 - 2014

N2 - Reentry telemetry channel is a special channel in the process of remote sensing, black barrier and multipath effect will cause the PCM/FM telemetry signal-to-noise ratio and frequency selective fading, even break through the traditional demodulation method of demodulation threshold, led to the bit error rate is greatly increased when aircraft fly through the reentry telemetry channel. Aiming at the problem, a sliding length of 1 more Symbol Detection (Multi - Symbol Detection, MSD) demodulation algorithm is studied: the continuous observations of N element signal and local signal for joint Detection, but each time the MSD sentences a MSD earlier with N - 1 element coincidence. In theory, the algorithm can increase the channel gain about 3 db, the simulation and test results verified the effectiveness of the proposed algorithm.

AB - Reentry telemetry channel is a special channel in the process of remote sensing, black barrier and multipath effect will cause the PCM/FM telemetry signal-to-noise ratio and frequency selective fading, even break through the traditional demodulation method of demodulation threshold, led to the bit error rate is greatly increased when aircraft fly through the reentry telemetry channel. Aiming at the problem, a sliding length of 1 more Symbol Detection (Multi - Symbol Detection, MSD) demodulation algorithm is studied: the continuous observations of N element signal and local signal for joint Detection, but each time the MSD sentences a MSD earlier with N - 1 element coincidence. In theory, the algorithm can increase the channel gain about 3 db, the simulation and test results verified the effectiveness of the proposed algorithm.

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DO - 10.4028/www.scientific.net/AMM.532.147

M3 - Paper

SP - 147

EP - 151

T2 - 2013 3rd International Conference on Mechatronics and Applied Mechanics, ICMAM 2013

Y2 - 27 December 2013

ER -