Methods and apparatus for use in simultaneously generating data sequences for spread spectrum communications

A data sequence generator for spread spectrum communications, comprising:

• a counter for use in repeatedly providing L discrete counter values at an output;
• a first data access module, including:
• an input coupled to the output that provides the L discrete counter values;
• an output to provide data of a first data sequence responsive to each one of the L discrete counter values, the first data sequence having a length L;
• and
• a second data access module, including:
• an input coupled to receive M discrete counter values derived from the output providing the L discrete counter values, M differing from L;
• an output to provide data of a second data sequence responsive to each one of the M discrete counter values;
• wherein the first data sequence comprises a pseudorandom (PN) sequence and L=215.

A data sequence generator for spread spectrum communications, comprising:

• a counter for use in repeatedly providing l discrete counter values at an output;
• a first data access module, including:
• an input coupled to the output that provides the L discrete counter values;
• an output to provide data of a first data sequence responsive to each one of the L discrete counter values, the first data sequence having a length L a second data access module, including:
• an input coupled to receive m discrete counter values derived from the output providing the L discrete counter values;
• an output to provide data of a second data sequence responsive to each one of the M discrete counter values;
• and
• wherein the second data sequence comprises Walsh code data of a Hadamard matrix.

A data sequence generator for spread spectrum communications, comprising:

• a counter for use in repeatedly providing L discrete counter values at an output;
• a first data access module, including:
• an input coupled to the output that provides the L discrete counter values;
• an output to provide data of a first data sequence responsive to each one of the L discrete counter values, the first data sequence having a length L;
• a second data access module, including:
• an input coupled to receive M discrete counter values derived from the output providing the L discrete counter values;
• an output to provide data of a second data sequence responsive to each one of the M discrete counter values;
• and
• wherein the first data sequence comprises a pseudorandom noise (PN) sequence and the second data sequence comprises Walsh code data of a Hadamard matrix.

A data sequence generator for spread spectrum communications, comprising:

• a counter for use in repeatedly providing L discrete counter values at an output;
• a first data access module, including:
• an input coupled to the output that provides the L discrete counter values;
• an output to provide data of a first data sequence responsive to each one of the L discrete counter values, the first data sequence having a length L;
• a second data access module, including:
• an input coupled to receive M discrete counter values derived from the output providing the L discrete counter values;
• an output to provide data of a second data sequence responsive to each one of the M discrete counter values;
• and
• wherein the input of the second data access module is coupled to only a portion of the output that provides the L discrete counter values.

A data sequence generator for spread spectrum communications, comprising:

• a counter for use in repeatedly providing L discrete counter values at an output;
• a first data access module, including:
• an input coupled to the output that provides the L discrete counter values;
• an output to provide data of a first data sequence responsive to each one of the L discrete counter values, the first data sequence having a length L;
• a second data access module, including:
• an input coupled to receive M discrete counter values derived from the output providing the L discrete counter values;
• an output to provide data of a second data sequence responsive to each one of the M discrete counter values;
• and
• wherein L=215 and M<215.

A method for use in simultaneously generating two or more data sequences in spread spectrum communications, comprising:

• providing first binary counter data at an input of a first data access module;
• repeatedly changing the first binary counter data at a chip rate to provide L discrete values at the input of the first data access module;
• for each value of the discrete values at the input of the first data access module, providing a selected bit of a pseudorandom noise (PN) sequence having a length l at an output of the first data access module;
• providing second binary counter data, which are derived from the first binary counter data, at an input to a second data access module so that M discrete values are provided at the input of the second data access module, wherein M<L;
• and
• for each value of the m discrete values at the input of the second data access module, providing a selected Walsh code bit of a Hadamard matrix at an output of the second data access module.

A method for use in simultaneously generating both pseudorandom noise (PN) sequences and Walsh sequences, the method comprising:

• repeatedly generating counter values from 0 to 215−1 at a 15-bit output;
• providing the 15-bit output at a 15-bit input of a data access module having at least one PN sequence of length 215 encoded therein;
• serially generating the at least one PN sequence at an output of the data access module in response to the counter values from 0 to 215−1 provided at the 15-bit input;
• providing N bits of the 15-bit output at an N-bit input of the data access module;
• and
• serially generating a Walsh sequence at an output of the data access module in response to counter values from 0 to 2N−1 provided at the N-bit input.

A data sequence generator for spread spectrum communications, comprising:

• at least one binary counter for use in repeatedly providing counter values from 0 to 215−1 at a 15-bit output;
• a first data access module;
• the first data access module comprising a read-only memory (ROM);
• the first data access module having first and second pseudorandom noise (PN) sequences encoded therein, each one of the first and second PN sequences having a length of 215;
• the first data access module having a 15-bit input coupled to the 15-bit output;
• the first data access module having a first bit output to provide a selected PN bit of the first PN sequence and a second bit output to provide a selected PN bit of the second PN sequence responsive each one of the counter values from 0 to 215−1;
• a second data access module;
• the second data access module having an N-bit input coupled to N bits of the 15-bit output;
• and
• the second data access module to provide Walsh code data of a 2N-by-2N Hadamard matrix responsive to each counter value at the N-bit address input.