Communication apparatus and communication method using digital wavelet multi carrier transmission system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNobutaka Kodama, Hisao Koga
Life of this patent
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Abstract
In case of disposing a pilot symbol in data transmission which depends on a DWMC transmission system, in a plurality of transmission symbols on a time axis, a pilot symbol, which becomes a signal of a sine wave, is configured, by giving contiguous identical data in a plurality of predetermined symbols. By transmitting a transmission signal with the use of this pilot signal, between a transmitting device and a receiving device, it is possible to carry out channel equalization by complex information which is obtained from a pilot symbol.
Claims30
A communication apparatus of a multi carrier transmission system, which carries out data transmission by digital modem processing, comprising:
- a modulator which inserts at least one symbol, to which contiguous identical data was given, into a transmission signal as a pilot symbol, and carries out digital multi carrier modulation processing of transmission signals by use of a filter bank subjecting wavelet transformation;
- and
- a transmitter which transmits the transmission signal including said pilot symbol, which was subjected the digital multi carrier modulation processing by said modulator.
A communication apparatus of a multi carrier transmission system, which carries out data transmission by digital modem processing, comprising:
- a receiver which receives a transmission signal including a pilot symbol configured by at least one symbol to which contiguous identical data was given;
- and
- a demodulator which carries out digital multi carrier demodulation processing of the transmission signal received by said receiver by use of a filter bank subjecting wavelet transformation.
A communication method of a multi carrier transmission system, which carries out data transmission by digital modem processing, the communication method comprising the steps of:
- inserting at least one symbol, to which contiguous identical data was given, into a transmission signal as a pilot symbol;
- carrying out digital multi carrier modulation processing of the transmission signal by use of a filter bank subjecting wavelet transformation;
- and
- transmitting the transmission signal including said pilot symbol, to which the digital multi carrier modulation processing was carried out.
A communication method of a multi carrier transmission system, which carries out data transmission by digital modem processing, the communication method comprising the steps of:
- receiving a transmission signal including a pilot symbol configured by at least one symbol to which contiguous identical data was given;
- and
- carrying out digital multi carrier demodulation processing of the transmission signal thus received by use of a filter bank subjecting wavelet transformation.
Dependencies are inferred from the claim text.