Bandwidth-efficient pilot symbol aided technique

Ng, Man Hung; Cheung, Siu Wun

doi:10.1049/el:19981088

Cited by 8 publications

(12 citation statements)

References 2 publications

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“…which can be used to correct the fading e!ect on the received symbol r I G as [10] The square error (SE) of the "rst data symbol d I of the kth frame can be calculated using (8) as…”

Section: Conventional Techniquementioning

confidence: 99%

“…The larger the fading estimate, the smaller is the resultant SE of the data symbol. Based on these "ndings, the bandwidth-e$cient technique [10] was proposed to minimize the SE by selecting equation (11a) or (11b), with the larger fading estimate, yN I or yN I *\ .…”

Section: Bandwidth-ezcient Techniquementioning

confidence: 99%

“…Since the detected data symbols are used to obtain a new estimate in (12), incorrect data detection will cause estimation errors that will propagate across the remaining data symbols of the frame. Since it has been shown that the bandwidth-e$cient technique is superior at high SNRs while the conventional technique performs better at low SNRs [10], here we propose to combine the fading estimates from the two techniques to achieve better estimation and the combining process is described as follows.…”

Section: Proposed Combining Techniquementioning

confidence: 99%

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Combining PSA fading estimation techniques for TCM and diversity reception in Rician fading channels

Ng¹,

Cheung

2001

Int. J. Satell. Commun.

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SUMMARYIn this paper, a novel pilot-symbol-aided (PSA) technique is proposed for fading estimation in the land mobile satellite fading channels. The proposed technique combines the fading estimates obtained from a bandwidth-e$cient technique and a conventional technique according to the signal-to-noise ratios (SNRs) of the fading estimates. To enhance the transmission quality, trellis-coded modulation (TCM) and diversity reception are employed in the system, and the combined estimates are subsequently used to correct the channel fading e!ects, to weight the signals from di!erent diversity branches, and to provide channel state information to the Viterbi decoder. Monte Carlo computer simulation has been used to study the bit-error-rate (BER) performance of the proposed technique on trellis-coded 16-ary quadrature amplitude modulation in the frequency non-selective Rician fading channels. Results have shown that the proposed PSA technique requires a very low bandwidth redundancy to provide satisfactory BER performance at low SNRs, and thus is suitable for use with TCM and diversity reception to achieve both bandwidth and power-e$cient transmission.

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“…which can be used to correct the fading e!ect on the received symbol r I G as [10] The square error (SE) of the "rst data symbol d I of the kth frame can be calculated using (8) as…”

Section: Conventional Techniquementioning

confidence: 99%

Section: Bandwidth-ezcient Techniquementioning

confidence: 99%

Section: Proposed Combining Techniquementioning

confidence: 99%

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Combining PSA fading estimation techniques for TCM and diversity reception in Rician fading channels

Ng¹,

Cheung

2001

Int. J. Satell. Commun.

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“…The use of pilot-symbol-aided (PSA) transmission to combat multipath fading in the digital mobile communication systems has been widely studied [1][2][3][4][5]8,9,11]. At a PSA transmitter, known pilot symbols are periodically inserted into the data sequence for transmission.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a fading estimation technique that employs both pilot and data symbols has been proposed to significantly reduce the bandwidth redundancy of the PSA systems [9]. With this technique, the initial estimates from the pilot symbols are adaptively refined using the detected data symbols, and linear interpolation is used to form the estimates for the remaining data symbols.…”

Section: Introductionmentioning

confidence: 99%

Combining Pilot-Symbol-Aided Techniques for Fading Estimation and Diversity Reception in Multipath Fading Channels

Cheung

2005

Wireless Netw

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A novel pilot-symbol-aided (PSA) fading estimation technique that combines the estimates from a conventional PSA technique and a bandwidth-efficient PSA technique to achieve better performances is proposed for digital signals in multipath fading channels. The conventional technique has better performances at low signal-to-noise ratios (SNRs), while the bandwidth-efficient technique is superior at high SNRs. Monte Carlo computer simulation has been used to assess the effects of the proposed combining technique on the bit-error-rate (BER) performances of 16-ary quadrature-amplitude-modulation (16QAM), with and without two-branch diversity reception, in a flat Rayleigh fading channel. Results have shown that the combining technique has the advantages of both of the conventional technique and the bandwidth-efficient technique and is more preferred for use with diversity reception.

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Synchronization

Purkayastha¹,

Sarma²

2015

A Digital Phase Locked Loop Based Signal and Symbol Recovery System for Wireless Channel

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Bandwidth-efficient pilot symbol aided technique

Cited by 8 publications

References 2 publications

Combining PSA fading estimation techniques for TCM and diversity reception in Rician fading channels

Combining PSA fading estimation techniques for TCM and diversity reception in Rician fading channels

Combining Pilot-Symbol-Aided Techniques for Fading Estimation and Diversity Reception in Multipath Fading Channels

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