US 6,959,030 B1 · Method and apparatus for generating an interleaved code

Abstract

An interleaved coding method can be used in a transmitter, in which the two or more pseudonoise (PN) codes are interleaved to form a longer interleaved code. The method can be used in a transmitter that includes a first code generator generating a first code of n symbols, and a second code generator generating a second code of m symbols, where n and m can be mutually prime, such as m=n+1. An interleave unit is coupled to the first and second code generators, and interleaves the symbols of the first code with the symbols of the second code to output an interleaved code. The interleaved code has a period longer than either of the constituent PN codes, providing for much increased noise tolerance over using the short codes alone, and can be detected at a much lower hardware and time cost than if using a single PN code of equal length.

Claims14

Dependent claims

A method of generating a combined code comprising:

a) combining a plurality of codes each having a length shorter than the combined code, the plurality of codes including at least three codes having lengths m, n, and p, where m, n, and p, are mutually prime, wherein the combined code has a length of 3·n·m·p;
and
b) outputting the combined code, wherein the plurality of codes can be detected from the combined code, and the phases of the combined code can be detected from the plurality codes.

Dependencies are inferred from the claim text.

Method and apparatus for generating an interleaved code

Life of this patent

Method and apparatus for generating an interleaved code

Life of this patent

Abstract

Claims14