Near Optimal Common Detection Techniques for Shaped Offset QPSK and Feher's QPSK

Nelson, Tom; Perrins, Erik; Rice, Michael

doi:10.1109/tcomm.2008.060155

Cited by 37 publications

(13 citation statements)

References 29 publications

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“…In addition, the channel estimation algorithm and equalization algorithm above can not only applied to the equalization of CPM signal, but also applied to the quasiconstant envelope FQPSK modulate signal [6][8], constant envelope SOQPSK modulate signal [7] and equalization of the linear modulate signal.…”

Section: Discussionmentioning

confidence: 99%

Low-complexity fractional-spaced equalization approach in the frequency domain for CPM

Xu¹,

Zhang²,

Ma³

et al. 2009

2009 9th International Symposium on Communications and Information Technology

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In this paper, a new receiver architecture with frequency-domain equalization (FDE) for continuous phase modulation (CPM) is proposed. With fractional-spaced FDE for up-sampled CPM signal, receivers designed for additive white Gaussian noise (AWGN) channel can be used for demodulating and detecting the CPM signal. Low complexity fractional-spaced channel estimation and FDE algorithms, which can estimate and equalize multipath channels with fractional-spaced delays, are also proposed in this paper. Moreover, we use linear frequency modulation sequence instead of Chu or FrankZ sequence to estimate the multipath channels, and reasons are analyzed. Bit error rate (BER) performances of ARTM CPM, FQPSK and SOQPSK-MIL modulations are simulated in different multipath channels, and simulation results show that the fractional-spaced FDE approach can effectively overcome the effects of multipath channels with long and fractional-spaced delays.I.

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Section: Discussionmentioning

confidence: 99%

Low-complexity fractional-spaced equalization approach in the frequency domain for CPM

Xu¹,

Zhang²,

Ma³

et al. 2009

2009 9th International Symposium on Communications and Information Technology

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“…The equalizer output forms the input to the well-known symbol-by-symbol SOQPSK detector comprising a detection filter operating at N = T b /T samples/bit and a decision process, operating on the decision variable u(k) at 1 sample/bit. This detector, based on an offset QPSK approximation of SOQPSK-TG, is described in more detail in [9,10]. The detectors of Figure 3 also include a phase lock loop (PLL).…”

Section: The Equalization Algorithmsmentioning

confidence: 99%

A Comparison of Three Equalization Techniques for iNET-Formatted SOQPSK-TG

Rice

Moazzami

Saquib³

et al. 2014

Self Cite

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“…Description of SOQPSK The SOQPSK modulation scheme [6][7][8] is defined as a continuous phase modulation (CPM) with baseband modulated signal expressed as…”

Section: Modulation Schemesmentioning

confidence: 99%

Adaptive Modulation Schemes for OFDM and SOQPSK Using Error Vector Magnitude (EVM) and Godard Dispersion

Han¹,

Walkenhorst²,

Wang³

2014

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Attn: Brett Walkenhorst Georgia Tech Applied Research Corporation, 505 10TH ST Atlanta GA 30332-0001 PERFORMING ORGANIZATION REPORT NUMBER412TW-PA-14271 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Test Resource Management Center Test and Evaluation/ Science and Technology 4800 Mark Center Drive, Suite 07J22 Alexandria, VA 22350 SPONSOR/MONITOR'S ACRONYM(S)N/A SPONSOR/MONITOR'S REPORT NUMBER(S) SET 2014-0039 DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release A: distribution is unlimited. SUPPLEMENTARY NOTESCA: Air Force Flight Test Center Edwards AFB CA CC: 012100 ABSTRACTIn this paper, we develop a new approach which enables adaptation across two modulation schemes in the iNET standard: orthogonal frequency-division multiplexing (OFDM) and shaped-offset quadrature phased-shift keying (SOQPSK). We present the error vector magnitude (EVM) for OFDM and second-order Godard dispersion (D (2) ) for SOQPSK as our link metrics that measure the degradation due to thermal noise and channel effects and then derive the mathematical relationship between these two metrics. This relationship enables us to utilize a set of empirically-derived rules that incorporate both modulation schemes. SUBJECT TERMS ABSTRACTIn this paper, we develop a new approach which enables adaptation across two modulation schemes in the iNET standard: orthogonal frequency-division multiplexing (OFDM) and shaped-offset quadrature phased-shift keying (SOQPSK). We present the error vector magnitude (EVM) for OFDM and second-order Godard dispersion (D (2) ) for SOQPSK as our link metrics that measure the degradation due to thermal noise and channel effects and then derive the mathematical relationship between these two metrics. This relationship enables us to utilize a set of empiricallyderived rules that incorporate both modulation schemes.

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Near Optimal Common Detection Techniques for Shaped Offset QPSK and Feher's QPSK

Cited by 37 publications

References 29 publications

Low-complexity fractional-spaced equalization approach in the frequency domain for CPM

Low-complexity fractional-spaced equalization approach in the frequency domain for CPM

A Comparison of Three Equalization Techniques for iNET-Formatted SOQPSK-TG

Adaptive Modulation Schemes for OFDM and SOQPSK Using Error Vector Magnitude (EVM) and Godard Dispersion

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