Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system
First Claim
1. A spread spectrum channel apparatus, comprising:
- (a) splitter means for accommodating a variable number of data channels by splitting each particular set of two received data symbols into a first and second array of data symbols in accordance with a particular algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the splitter means comprising means for implementing the first algorithm by providing both data symbols of the particular set to the first and second array of data symbols, the splitter means further comprising means for implementing the second algorithm by providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols; and
(b) code division channel coding means, operatively coupled to the splitter means, for determining particular channels to transmit the first and second array of data symbols by spreading the first and second array of data symbols with a predetermined length spreading code, the predetermined length of the spreading code being set in response to the particular splitting algorithm selected.
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Abstract
A method and apparatus is provided for transmitting spread spectrum signals. The transmitter receives data symbols. Subsequently, the transmitter splits each particular set of two received data symbols into a first and second array of data symbols according to either of two algorithms. The first algorithm including providing both data symbols of the particular set to the first and second array of data symbols and the second algorithm including providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols. Subsequently, the transmitter determines particular channels to transmit the first and second array of data symbols by spreading the first and second array of data symbols with a predetermined length Walsh code. The transmitter accommodates a variable number of data channels by selecting a particular algorithm from a group consisting essentially of a first algorithm and a second algorithm and setting the predetermined length Walsh code in response to the particular algorithm selected.
147 Citations
14 Claims
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1. A spread spectrum channel apparatus, comprising:
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(a) splitter means for accommodating a variable number of data channels by splitting each particular set of two received data symbols into a first and second array of data symbols in accordance with a particular algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the splitter means comprising means for implementing the first algorithm by providing both data symbols of the particular set to the first and second array of data symbols, the splitter means further comprising means for implementing the second algorithm by providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols; and (b) code division channel coding means, operatively coupled to the splitter means, for determining particular channels to transmit the first and second array of data symbols by spreading the first and second array of data symbols with a predetermined length spreading code, the predetermined length of the spreading code being set in response to the particular splitting algorithm selected. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of communicating a spread spectrum signal, comprising:
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(a) accommodating a variable number of data channels by splitting each particular set of two received data symbols into a first and second array of data symbols by providing both data symbols of the particular set to the first and second array of data symbols, if a first algorithm is selected; (b) accommodating a variable number of data channels by splitting each particular set of two received data symbols into a first and second array of data symbols by providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols, if a second algorithm is selected; and (c) determining particular channels to transmit the first and second array of data symbols by spreading the first and second array of data symbols with a predetermined length spreading code, the predetermined length of the spreading code being set in response to the particular splitting algorithm selected. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of communicating a spread spectrum signal, comprising
(a) sampling a signal received from over the communication channel into a first and second array of data samples by despreading the received signal with a predetermined length spreading code, the received signal comprising spread data symbols from a first and a second array of data symbols wherein the first and second array of data symbols are formed from particular sets of two data symbols in accordance with a particular splitting algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the first algorithm comprising providing both data symbols of the particular set to the first and second array of data symbols, the second algorithm comprising providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols, the spread data symbols being spread by the predetermined length spreading code, the predetermined length of the spreading code being set in response to the particular splitting algorithm selected; - and
(b) accommodating a variable number of data channels by combining the first and second array of data samples into a stream of received data samples in accordance with a particular algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the first algorithm comprising combining a data sample of the first array of data samples and a data sample of the second array of data samples into a combined data sample and subsequently including the combined data sample in the stream of received data samples, the second algorithm comprising including a data sample of the first array of data samples in the stream of received data samples and including a data sample of the second array of data samples in the stream of received data samples.
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14. A spread spectrum channel apparatus, comprising
(a) code division channel decoding means for sampling a signal received from over the communication channel into a first and second array of data samples by despreading the received signal with a predetermined length spreading code, the received signal comprising spread data symbols from a first and a second array of data symbols wherein the first and second array of data symbols are formed from particular sets of two data symbols in accordance with a particular splitting algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the first algorithm comprising providing both data symbols of the particular set to the first and second array of data symbols, the second algorithm comprising providing one of the data symbols of the particular set to the first array of data symbols and the other of the data symbols of the particular set to the second array of data symbols, the spread data symbols being spread by the predetermined length spreading code, the predetermined length of the spreading code being set in response to the particular splitting algorithm selected; - and
(b) combiner means, operatively coupled to the code division channel decoding means, for accommodating a variable number of data channels by combining the first and second array of data samples into a stream of received data samples in accordance with a particular algorithm selected from the group consisting essentially of a first algorithm and a second algorithm, the combiner means comprising means for implementing the first algorithm by combining a data sample of the first array of data samples and a data sample of the second array of data samples into a combined data sample and subsequently including the combined data sample in the stream of received data samples, the combiner means further comprising means for implementing the second algorithm by including a data sample of the first array of data samples in the stream of received data samples and including a data sample of the second array of data samples in the stream of received data samples.
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Specification