Reception apparatus using spread spectrum communication scheme
AssigneeRenesas Technology Corp.
InventorMasayuki KOYAMA
Life of this patent
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Abstract
In a reception apparatus, a matched filter that has conventionally been arranged in a searcher unit is mounted on an acquisition unit together with a large scale memory. The large scale memory once stores reception chip signals, and thereafter outputs them to the matched filter and to the delay profile calculation unit. A setting register receives an acquisition signal and outputs it to the matched filter. The matched filter performs acquisition of the reception chip signals outputted from the large scale memory, and outputs a despread timing signal to a despread circuit, a code generation circuit and the delay profile calculation unit.
Claims2
A reception apparatus, comprising:
- an input process unit configured to wirelessly process a reception signal and output a plurality of reception chip signals wherein each of the plurality of reception chip signals correspond to a distinct spread code;
- an acquisition unit configured to perform an acquisition of said plurality of reception chip signals and output a timing signal together with said plurality of reception chip signals;
- a spread spectrum demodulation unit configured to receive said timing signal, perform a demodulation process of said plurality of reception chip signals outputted from said acquisition unit, and output a combination symbol signal;
- and
- an output process unit configured to perform a decode process of said combination symbol signal and output audio data, wherein
- said acquisition unit includes
- a memory configured to temporarily hold said plurality of reception chip signals, and
- a matched filter configured to perform an acquisition of said plurality of reception chip signals outputted from said memory, and output said timing signal according to a result of said acquisition to said spectrum demodulation unit, wherein
- said memory simultaneously holds said plurality of reception chip signals which are subjected to a same spread code and outputs said plurality of reception chip signals to said matched filter and said spread spectrum demodulation unit, and
- said spectrum demodulation unit successfively reads said plurality of reception chip signals subjected to said same spread code in order of arrival at said reception apparatus.
Dependencies are inferred from the claim text.