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A block coding scheme for the reduction of the peak to mean envelope power ratio of multicarrier transmission schemes is described. The principle of the scheme is illustrated with the specific example of a four carrier signal. The potential of the technique is investigated and it is shown that the application of a 1/2 rate code could typically result in a peak to mean envelope power ratio of around 3dB. The development of the technique in terms of the selection of suitable sets of code words based on Shapiro-Rudin sequences, Golay complementary sequences and other larger sets of code words is investigated. However, it is shown that none of these code sets are ideal.

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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.