Device and method for adaptive narrow band interference suppression in multiple-access communications
First Claim
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1. A device for providing interference suppression for receiving a burst transmission of a modulated digital data signal from one of a plurality of users in the presence of interference in a multiple-access communication system, comprising:
- A) a demodulating front end for demodulating the received burst transmission to provide a demodulated signal;
B) an adaptive signal detection unit, coupled to receive the demodulated signal and coupled to an adaptive element memory, for processing the demodulated signal utilizing the adaptive elements received from the adaptive element memory, and for updating said adaptive elements using a predetermined adaptation algorithm based on the demodulated signal for suppressing interference; and
C) the adaptive element memory, coupled to the adaptive signal detection unit, for receiving updated adaptive elements from the adaptive signal detection unit and storing them, wherein adaptive elements received by the adaptive element memory prior to the reception of a next burst transmission are utilized by the adaptive signal detection unit to process the next burst transmission wherein the next burst transmission is received from any one of the plurality of users.
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Abstract
The present invention provides a device and method in multi-access communications system for reliably receiving burst transmissions from users in the presence of narrow band interference. The adaptive interference suppresser incorporates adaptive elements that are updated using a predetermined adaptation algorithm. These adaptive elements are stored in memory at the end of the burst transmission for reuse in receiving a next burst transmission.
55 Citations
25 Claims
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1. A device for providing interference suppression for receiving a burst transmission of a modulated digital data signal from one of a plurality of users in the presence of interference in a multiple-access communication system, comprising:
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A) a demodulating front end for demodulating the received burst transmission to provide a demodulated signal; B) an adaptive signal detection unit, coupled to receive the demodulated signal and coupled to an adaptive element memory, for processing the demodulated signal utilizing the adaptive elements received from the adaptive element memory, and for updating said adaptive elements using a predetermined adaptation algorithm based on the demodulated signal for suppressing interference; and C) the adaptive element memory, coupled to the adaptive signal detection unit, for receiving updated adaptive elements from the adaptive signal detection unit and storing them, wherein adaptive elements received by the adaptive element memory prior to the reception of a next burst transmission are utilized by the adaptive signal detection unit to process the next burst transmission wherein the next burst transmission is received from any one of the plurality of users. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for providing interference suppression for receiving a burst transmission of a modulated digital data signal from one of a plurality of users in the presence of interference in a multiple-access communication system, comprising:
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A) demodulating, by a demodulating front end, the received burst transmission to provide a demodulated signal. B) adaptive processing, using an adaptive signal detection unit having adaptive elements, coupled to receive the demodulated signal and coupled to an adaptive element memory, for processing the demodulated signal utilizing the adaptive elements received from the adaptive element memory, and for updating said adaptive elements using a predetermined adaptation algorithm based on the demodulated signal for suppressing interference; and C) storing, by the adaptive element memory, of the adaptive elements received from the adaptive signal detection unit, wherein said adaptive elements computed prior to receiving the burst transmission are used by the adaptive signal detection unit to process the next burst transmission wherein the next burst transmission is received from any one of the plurality of users. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification