Third-generation tdrss-compatible direct-sequence spread-spectrum digital receiver
Kwon, Hyuck M.
Kwon, Hyuck M.
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1997-11-30
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Keywords
1-b A/d Signal Processing,Digital Receiver,Pn Code Acquisition,Pn Spread Spectrum,Satellite Communications,Analog To Digital Conversion,Binary Codes,Bit error rate,Communication Satellites,Digital Communication Systems,Error Analysis,Signal Processing,Spread Spectrum Communication,Synchronization,Pseudonoise (pn) Codes,Tracking Data Relay Satellite Systems (tdrss),Radio Receivers
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Citation
H. M. Kwon, "Third-generation TDRSS-compatible direct-sequence spread-spectrum digital receiver," in IEEE Transactions on Vehicular Technology, vol. 46, no. 4, pp. 891-899, Nov. 1997, doi: 10.1109/25.653063
Abstract
Recently, a digital communication receiver, called a third-generation receiver, has been developed. This receiver takes samples of the direct-sequence spread signal at a nonzero intermediate frequency (IF) instead of the zero IF (baseband), and quantizes the samples by employing a 1-b analog-to-digital (A/D) converter at the receiver front end. These 1-b samples are digitally processed for pseudonoise (PN) code, carrier, bit synchronization, and bit decision with the use of an applicationspecific integrated circuit. In this paper, the effects of the IF sampling and 1-b A/D conversion on PN code synchronization are analyzed for a PN spread-spectrum communication system with oversampling rate, e.g., 12 samples per chip. In addition, bit-error rate (BER) degradation due to the 1-b A/D conversion is studied by assuming perfect PN code, carrier, and bit synchronization. It is observed that BER degradation due to the 1-b A/D is significant, e.g., 2.4 dB, when decimation is made after IF sampling such that only one sample per chip is used for bit decision. These analyzed BER results agree well with the simulated results. However, if no decimation is made and oversampling is used for bit decision, BER degradation due to 1-b A/D conversion is insignificant, e.g., 0.6 dB. © 1997 IEEE. © 2011 Elsevier B.V., All rights reserved.
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This is an open access article under the CC by license.
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IEEE
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IEEE Transactions on Vehicular Technology
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00189545; 19399359