Searching for signals in a communications system

A receiver system for locating signal path-rays in a communications system, comprising:

• a decimation part that decimates a signal in accordance with a decimation factor;
• at least one filter connected to said decimation part, said at least one filter involved in determining a first location of said signal;
• a code generator part, said code generator part adapted to generate a code pattern, wherein a version of said code pattern is an un-shifted version of said code pattern;
• at least two shifters connected to said at least one filter to receive said first location and said signal, said at least two shifters for shifting said signal to produce at least two shifted versions of said signal based on said first location;
• and
• at least two correlators, of each said at least one correlator correlating the at least two shifted versions of said signal to the un-shifted version of said at least one code pattern.

A method for locating signal path-rays in a communications system, comprising the steps of:

• receiving a signal;
• decimating said signal to produce a decimated signal;
• processing said decimated signal to produce at least one first location having a first precision;
• processing said received signal and a generated code using said at least one first location having said first precision to produce at least one second location having a second precision, said first precision being less precise than said second precision;
• said step of processing said signal further comprising the steps of:
• generating said code;
• shifting based on said first location;
• correlating said generated code to said signal, one of said generated code and said signal having been shifted in said step of shifting;
• and
• selecting said second location in response to said step of correlating.

A receiver system for locating signal path-rays in a communications system, comprising:

• a decimation part that decimates a signal in accordance with a decimation factor;
• at least one filter connected to said decimation part, said at least one filter involved in determining a first location of said signal;
• a code generator part, said code generator part adapted to generate a code pattern;
• at least two shifters connected to said at least one filter to receive said first location, said signal or said code pattern, said at least one shifter performing either:
• a shifting of said signal to produce a shifted version of said signal based on said first location;
• or
• a shifting of said code pattern to produce a plurality of shifted versions of said code pattern based on said first location;
• at least two correlators, each of said two correlators performing at least one of:
• correlating said shifted version of said signal to an un-shifted version of said code pattern to produce a second location, when said signal is shifted by said shifters;
• and
• correlating an un-shifted versions of said signal to said shifted version of said code pattern to produce said second location when said code sequence is shifted by said shifters.

A receiver system for locating signal path-rays in a communications system, comprising:

• a decimation part that decimates a signal in accordance with a decimation factor;
• at least one filter connected to said decimation part, said at least one filter involved in determining a first location of said signal;
• a code generator part, said a code generator part adapted to generate code pattern;
• at least two shifters connected to said at least one filter to receive said first location and said code pattern, said at least two shifters for shifting said code pattern to produce a plurality of shifted versions of said code pattern based on said first locations;
• and
• at least two correlators, of each said at least two correlators correlating an un-shifted version of said signal to the plurality of shifted versions of said code pattern.