Modulation and equalisation considerations for high performance radio LANs (HIPERLAN)

Nix, Andrew R; Li, M.; Marvill, J.D.; Wilkinson, T.A.; Johnson, I. R.; Barton, S.K.

doi:10.1109/wncmf.1994.529102

Cited by 17 publications

(5 citation statements)

References 3 publications

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“…This project proposed GMSK with a BT product of 0.5 and a transmission rate of 15 Mbit/s in a 25-MHz channel. A complete description of the LAURA proposal was given in [37] and [61].…”

Section: Modulation Scheme For the Single-carrier/ Equalizer Transmismentioning

confidence: 99%

A report on HIPERLAN standardization

Wilkinson

Phipps²,

Barton

1995

Int J Wireless Inf Networks

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HIPERLAN is the new European standard for radio LANs currently being formulated by ETSI RES10 for operation at 5 GHz and 17 GHz. It will be suitable for radio replacement of wired LANs and for ad hoc networking providing a user data rate of 10-20 Mbit/s. This paper is a review of the work of ETSI RES10 on the formulation of the HIPERLAN standard. The origins of ETSI RES10 are documented. The targets set for HIPERLAN and the problems in achieving these targets are discussed. The paper reviews the technical arguments for and against the proposed solutions to these problems, concentrating on the design of the transmission scheme and the channel access mechanism. The discussions leading to significant decisions about the standard are summarized. If the FCC in the United States of America allocate the equivalent 5 GHz band to unlicensed wireless LAN systems, many of these discussions will be revisited for future standards in this band. The paper will be of interest to anyone in academia or industry wishing to be brought quickly up to date with the state of the standard in order to focus their research or development activities. The paper also gives a general insight into the technical side of the standards formulation process in ETSI.

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“…This project proposed GMSK with a BT product of 0.5 and a transmission rate of 15 Mbit/s in a 25-MHz channel. A complete description of the LAURA proposal was given in [37] and [61].…”

Section: Modulation Scheme For the Single-carrier/ Equalizer Transmismentioning

confidence: 99%

A report on HIPERLAN standardization

Wilkinson

Phipps²,

Barton

1995

Int J Wireless Inf Networks

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“…The proposed Hiperlan standard [7] is being developed to support data rates of approximately 20Mb/s. At this high rate the ISI is predicted to cover up to seven symbol periods.…”

Section: Combined Lms/ci Estimation Equalisermentioning

confidence: 99%

“…At this high rate the ISI is predicted to cover up to seven symbol periods. An implementation of the Square Root Kalman algorithm for use on this system is currently being developed but requires the use of four C40 processors in parallel [7]. An alternative approach is to compute the equaliser tap weights directly from the Wiener-Hopf equations formed from an estimate of the CIR.…”

Section: Combined Lms/ci Estimation Equalisermentioning

confidence: 99%

“…The training data in current TDMA systems is located at either the start (a preamble) or centre (a midamble) of a transmitted packet. It is proposed therefore that the equaliser is trained off-line by buffering each received frame [7]. This allows symbol timing and frame synchronisation to be determined prior to training.…”

Section: Introductionmentioning

confidence: 99%

“…The choice of equaliser length and exponential weighting factor required for starting up the DFE are described in section 11. Due to the very large time delay spread of the new ETSI Hiperlan standard [7], a low complexity algorithm is proposed for this system in section 11. The issue of frame synchronisation is discussed in section 111.…”

Section: Introductionmentioning

confidence: 99%

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Algorithms for flexible equalisation in wireless communications

Perry

Bull

Nix

Proceedings of ISCAS'95 - International Symposium on Circuits and Systems

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In this paper the requirements for a flexible equaliser architecture for wireless communications are discussed and illustrated with results from simulation. Decision Feedback Equalisers are compared in terms of their performance and computational requirements. It has been found that the recursive modified Gram Schmidt algorithm provides superior BER performance to the least squares lattice decision feedback lattice and the conventional RLS algorithm. In addition the problem of synchronising the equaliser to achieve best performance and exploit the multipath propagation of the wideband channel is addressed. For a two path Rayleigh fading channel model it is shown that best performance is obtained by synchronising the frame to the arrival time of the first multipath rather than the dominant path.

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