Mobile station capable of channel estimation using substantial single antenna at path switching, channel estimating apparatus and its receiving method

A mobile station adapted to receive first and second signals from first and second antennas of a base station via a plurality of propagation paths and Rake-combine said received first and second signals by removing phase fluctuation among said signals, comprising:

• a plurality of receiving sections each adapted to receive said first and second signals to generate first and second received signals for one of said propagation paths;
• a plurality of channel estimating sections each connected to one of said receiving sections and adapted to calculate first and second channel coefficients of said first and second received signals and calculate first and second average channel coefficients of said first and second channel coefficients, respectively, as channel estimating values;
• and
• a plurality of synchronous detectors, each connected to one of said channel estimating sections and adapted to perform a synchronous detection upon said first and second received signals using one of said channel estimated values,
• each of said channel estimating sections detecting a path switching from one of said propagation paths to another and clearing one of said first and second channel coefficients when said path switching is detected.

A mobile station adapted to receive first and second signals from first and second antennas of a base station via a plurality of propagation paths and Rake-combine said received first and second signals by removing phase fluctuation among said signals, comprising:

• a plurality of receiving sections each adapted to receive said first and second signals to generate first and second received signals for one of said propagation paths;
• a plurality of channel estimating sections each connected to one of said receiving sections and adapted to calculate first and second channel coefficients of said first and second received signals and calculate first and second average channel coefficients of said first and second channel coefficients, respectively, as channel estimating values;
• and
• a plurality of synchronous detectors, each connected to one of said channel estimating sections and adapted to perform a synchronous detection upon said first and second received signals using one of said channel estimated values,
• each of said channel estimating sections detecting a path switching from one of said propagation paths to another and clearing one of said first and second average channel coefficients when said path switching is detected.

A mobile station adapted to receive first and second signals from first and second antennas of a base station via a plurality of propagation paths and Rake-combine said received first and second signals by removing phase fluctuation among said signals, comprising:

• a plurality of receiving sections each adapted to receive said first and second signals to generate first and second received signals for one of said propagation paths;
• a plurality of channel estimating sections each connected to one of said receiving sections and adapted to calculate first and second channel coefficients of said first and second received signals and calculate first and second average channel coefficients of said first and second channel coefficients, respectively, as channel estimating values;
• and
• a plurality of synchronous detectors, each connected to one of said channel estimating sections and adapted to perform a synchronous detection upon said first and second received signals using one of said channel estimated values,
• each of said channel estimating sections detecting a path switching from one of said propagation paths to another, comparing a smaller one of electric field strengths of said first and second received signals with a threshold value, and clearing one of said first and second channel coefficients or one of said first and second average channel coefficients in accordance with a comparing result of the smaller one of the electric fields with the threshold value when said path switching is detected.

A method adapted to receive first and second signals from first and second antennas of a base station via a plurality of propagation paths and Rake-combine said received first and second signals by removing phase fluctuation among said signals, comprising:

• descrambling said received first and second signals for said propagation path;
• calculating section adapted to first and second channel coefficients of said descrambled first and second signals;
• calculating average channel coefficients of said first and second channel coefficients, respectively;
• performing a synchronous detection upon said descrambled first and second signals using said first and second average channel coefficients;
• and
• detecting a path switching of said first and second signals to clear either one of said first and second channel coefficients or one of said first and second average channel coefficients.