Receiver and receiving method in spread spectrum communication system
AssigneeKawasaki Microelectronics, Inc.
InventorsTakaharu Sato, Takashi Ueda
Life of this patent
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Abstract
An over-sampling circuit is provided at a front stage of a digital matched filter, and a received signal is over-sampled with it. Synchronous acquisition of the received spread spectrum signal is implemented by adding the data obtained by the over-sampling, inputting it into the digital matched filter, and then performing a correlation thereon.
Claims8
A spread spectrum communication receiver which implements a synchronous acquisition of a received spread spectrum signal, comprising:
- an over-sampling circuit for implementing an N-times over-sampling for one chip of the received signal (N is integer larger than 1);
- and
- a digital matched filter for obtaining a correlation between the received signal and a spread code pattern installed therein,
- wherein N pieces of data obtained by the over-sampling are added, the added data is divided by the sampling number N so as to equalize the added data, and the equalized data is input to the digital matched filter.
A spread spectrum communication receiver which implements a synchronous acquisition of a received spread spectrum signal, comprising:
- an over-sampling circuit for implementing an N-times over-sampling for one chip of the received signal (N is integer number larger than 1);
- and
- a digital matched filter for obtaining a correlation between the received signal and a spread code pattern installed therein,
- wherein N pieces of data obtained by the over-sampling are added, the added data is input to the digital matched filter, the digital matched filter has the same number of stages as one in a case that provides no over-sampling, and operates at a chip rate.
Dependencies are inferred from the claim text.