Wireless base system, and directivity control method
AssigneeSanyo Electric Co., Ltd.
InventorYoshiharu Doi
Life of this patent
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Abstract
Antennas in an entire radio base station system are divided into two antenna groups so that each group has antennas in the number that allows convergence of reception directivity using a reference signal length. Reception weight vector calculators (112, 212) corresponding to respective antenna groups perform adaptive array processings, and corresponding array outputs are provided to a maximum ratio combining circuit (18). The maximum ratio combining circuit (18) performs maximum ratio combining of the array outputs corresponding to two antenna groups, based on weight information output from the reception weight vector calculators (112, 212).
Claims12
A radio base station system communicating signals with a plurality of mobile terminals using a plurality of antennas (A11 to A1L, A21 to A2L), said signal being divided into signal sections including a known reference signal of a first signal length and a data signal of a second signal length, said plurality of antennas being divided into a plurality of antenna groups each including antennas in a number that allows convergence of reception directivity using the known reference signal of said first signal length, the radio base station system comprising:
- a plurality of adaptive array processing portions (MR11 to MR1L, 110 to 116, MR21 to MR2L, 210 to 216) provided corresponding to said plurality of antenna groups respectively, each performing a prescribed adaptive array processing to signals received at corresponding said antenna group to extract an array output signal corresponding to a specific mobile terminal among said plurality of mobile terminals, and generating weight information based on accuracy of said adaptive array processing;
- and
- a reception signal generating portion (18, 20) generating a reception signal from said specific mobile terminal, based on a plurality of said array output signals corresponding to said specific mobile terminal and a plurality of pieces of said weight information supplied from said plurality of adaptive array processing portions.
A method of controlling directivity in a radio base station system communicating signals with a plurality of mobile terminals using a plurality of antennas (A11 to A1L, A21 to A2L), said signal being divided into signal sections including a known reference signal of a first signal length and a data signal of a second signal length, said method comprising the steps of:
- dividing said plurality of antennas into a plurality of antenna groups each including antennas in a number that allows convergence of reception directivity using the known reference signal of said first signal length;
- performing a prescribed adaptive array processing to signals received at corresponding said antenna group for each of said plurality of antenna groups to extract an array output signal corresponding to a specific mobile terminal among said plurality of mobile terminals, and generating weight information based on accuracy of said adaptive array processing;
- and
- generating a reception signal from said specific mobile terminal, based on a plurality of said array output signals corresponding to said specific mobile terminal and a plurality of pieces of said weight information.
Dependencies are inferred from the claim text.