Patent ID: 7145886

Claim:
A communication terminal apparatus that receives a plurality of transmission signals that are transmitted in parallel from different antennas of a base station apparatus, said plurality of transmission signals comprising data spread by respective spreading code sequences, and being multiplexed with respective midambles, said communication terminal apparatus comprising: a plurality of despreaders that despread data parts of the plurality of transmission signals by said respective spreading code sequences; a plurality of demodulators that demodulate signals despread in the despreaders; a data configurer that restores a plurality of data demodulated in the demodulators in form prior to division, and obtains received data; a plurality of measurers that measure and average respective reception powers of midamble parts of received transmission signals; a combiner that weights a plurality of reception power average values measured at said plurality of measurers, combines weighted reception power average values and obtains a combined reception power; and a transmission power controller that performs open loop transmission power control by a value obtained by adding interference power at the base station apparatus and a predetermined constant to a propagation loss which is a difference between transmission power of the base station apparatus and the combined reception power.