METHOD AND APPARATUS FOR MINIMIZING CO-CHANNEL INTERFERENCE
First Claim
1. A method for minimizing co-channel interference in a communication system, the method comprising the steps of:
- scrambling a header of a first frame based on a first unique word;
scrambling a payload and a pilot block of the first frame based on a first scrambling sequence;
scrambling a header of a second frame based on a second unique word;
scrambling a payload and a pilot block of the second frame based on a second scrambling sequence, wherein the first frame including the corresponding scrambled header and the second frame including the corresponding scrambled header are transmitted, respectively, over adjacent co-channels of the communication system.
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Accused Products
Abstract
An approach is provided for minimizing co-channel interference in a communication system is disclosed. A header of a first frame is scrambled based on a first unique word. A header of a second frame is scrambled based on a second unique word. The first frame including the corresponding scrambled header and the second frame including the corresponding scrambled header are transmitted, respectively, over adjacent co-channels of the communication system. Each of the frames further includes a payload and a pilot block. The payload and the pilot block of the first frame are scrambled based on a first scrambling sequence. The payload and the pilot block of the second frame are scrambled based on a second scrambling sequence. The above arrangement is particularly suited to a digital satellite broadcast and interactive system.
26 Citations
39 Claims
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1. A method for minimizing co-channel interference in a communication system, the method comprising the steps of:
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scrambling a header of a first frame based on a first unique word;
scrambling a payload and a pilot block of the first frame based on a first scrambling sequence;
scrambling a header of a second frame based on a second unique word;
scrambling a payload and a pilot block of the second frame based on a second scrambling sequence, wherein the first frame including the corresponding scrambled header and the second frame including the corresponding scrambled header are transmitted, respectively, over adjacent co-channels of the communication system. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17)
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2. (canceled)
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15. An apparatus for minimizing co-channel interference in a communication system, comprising:
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a scrambler configured to scramble a header of a first frame based on a first unique word, and to scramble a header of a second frame based on a second unique word, the scrambler being further configured to scramble a payload and a pilot block of the first frame based on a first scrambling sequence and to scramble a payload and a pilot block of the second frame based on a second scrambling sequence, wherein the first frame including the corresponding scrambled header and the second frame including the corresponding scrambled header are transmitted, respectively, over adjacent co-channels of the communication system. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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16. (canceled)
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28. A method of communicating comprising the steps of:
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tuning to a default carrier to receive scrambling information, wherein the scrambling information includes a unique word and a scrambling sequence corresponding to a particular carrier among a plurality of adjacent carriers, the unique word and the scrambling sequence being selected to minimize co-channel interference with respect to the adjacent carriers;
tuning to the particular carrier for receiving a scrambled frame including a header, a payload, and a pilot block;
descrambling the header with the unique word; and
descrambling the payload and the pilot block with the scrambling sequence. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 37, 38, 39)
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36. A method according to claim wherein the scrambling sequences are based on Gold sequences.
Specification