Positioning Information

An apparatus comprising:

• at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
• obtain samples of received positioning information from at least one channel of a plurality of channels, the at least one channel having a band identified by a carrier frequency;
• identify one or more of said channels as benchmark channels, wherein each benchmark channel has a higher quality than that of non-benchmark channels;
• determine a benchmark channel response representative of channel propagation conditions for at least one of the benchmark channel;
• generate a common benchmark channel response based on said benchmark channel responses;
• estimate channel responses for at least some of the non-benchmark channels, based, at least in part, on the common benchmark channel response;
• determine differences between reconstructed positioning information samples derived using said estimated non-benchmark channel responses and received positioning information samples for the same channels;
• modify positioning information samples of at least some of the non-benchmark channels based on said determined differences to generate corrected positioning information samples;
• and
• combine the positioning information samples of said one or more benchmark channels and the one or more corrected positioning information samples to generate combined positioning information samples.

A method comprising:

• obtaining samples of received positioning information from at least one channel of a plurality of channels, the at least one channel having a band identified by a carrier frequency;
• identifying one or more of said channels as benchmark channels, wherein each benchmark channel has a higher quality than that of non-benchmark channels;
• determining a benchmark channel response representative of channel propagation conditions for at least one of the benchmark channel;
• generating a common benchmark channel response based on said benchmark channel responses;
• estimating channel responses for at least some of the non-benchmark channels, based, at least in part, on the common benchmark channel response;
• determining differences between reconstructed positioning information samples derived using said estimated non-benchmark channel responses and received positioning information samples for the same channels;
• modifying positioning information samples of at least some of the non-benchmark channels based on said determined differences to generate corrected positioning information samples;
• and
• combining the positioning information samples of said one or more benchmark channels and the one or more corrected positioning information samples to generate combined positioning information samples.

A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least the following:

• obtaining samples of received positioning information from at least one channel of a plurality of channels, the at least one channel having a band identified by a carrier frequency;
• identifying one or more of said channels as benchmark channels, wherein each benchmark channel has a higher quality than that of non-benchmark channels;
• determining a benchmark channel response representative of channel propagation conditions for at least one of the benchmark channel;
• generating a common benchmark channel response based on said benchmark channel responses;
• estimating channel responses for at least some of the non-benchmark channels, based, at least in part, on the common benchmark channel response;
• determining differences between reconstructed positioning information samples derived using said estimated non-benchmark channel responses and received positioning information samples for the same channels;
• modifying positioning information samples of at least some of the non-benchmark channels based on said determined differences to generate corrected positioning information samples;
• and
• combining the positioning information samples of said one or more benchmark channels and the one or more corrected positioning information samples to generate combined positioning information samples.