Method of transmitting a data stream, transmitter and receiver

Details Method of transmitting a data stream, transmitter and receiver Method of transmitting a data stream, transmitter and receiver

H - Electricity

04

J

H04J 1/02 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2115118

ABSTRACT: Method of transmitting a data stream, transmitter and receiver. The invention relates to a method of transmitting data by modulating a frequency multiplex of carriers at a relatively low symbol rate, such as in OFDM. According to the inventive method, intersymbol interference is deliberately introduced at the transmitter side to reduce cross-talk between data of different carriers at the receiver side, such as to simplify an equalizing device in a receiver. The intersymbol interfer- ence at the transmitter side is introduced after the frequency multiplex modulation has taken place, by repeating groups of output symbols produced by an IFFT transformer and subsequently shaping these repeated groups by means of symbol-by-symbol scaling with coefficients constituting a window function. Subsequent shaped and repeatedgroups of these output symbols mutually overlap.

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