Code reuse apparatus in CDMA wireless communication system using beamforming by antenna array and code reuse method therefor

A code reuse apparatus in a code division multiple access wireless communication system using beamforming by an antenna array, the apparatus comprising:

• a correlation examination unit for examining a spatial correlation between a new mobile station requesting communication and each of existing mobile stations using already allocated codes, based on long-term information reflecting spatial characteristics of beams transmitted to the new and existing mobile stations, wherein the correlation examination unit calculates orthogonal values between the long-term information of the new mobile station and the long-term information of the existing mobile stations using the already allocated codes;
• and
• a reuse code selection unit for selecting one among the already allocated codes to reuse as a code for the new mobile station depending on the results of the correlation examination.

A code reuse apparatus in a code division multiple access wireless communication system using beamforming by an antenna array, the apparatus comprising:

• an orthogonal code generation unit for determining whether a code will be reused or not and generating orthogonal code information according to the determination results;
• and
• a code reuse unit for examining a spatial correlation between a new mobile station requesting communication and each of existing mobile stations using already allocated codes, based on long-term information and selecting one among the already allocated codes to reuse as a code for the new mobile station depending on the results of the correlation examination, the code reuse unit including an orthogonality comparison unit for comparing the long-term information of the existing mobile stations having the already allocated codes with long-term information of the new mobile station, when the orthogonal code generation unit determines a code will be reused.