| 摘要 |
PURPOSE: An apparatus for transmitting high-speed data through a traffic channel of a wireless local loop is provided to transmit high-speed data of 384 Kbps by controlling rate of a convolutional encoder, thereby transmitting high-speed data and moving pictures as well as voice. CONSTITUTION: A rate="3/4", K="9" convolutional encoder(21) receives traffic channel bit for performing convolutional encoding of rate="3/4", K="9" for enabling high-speed data transmission. A block interleaver(22) receives the output of the rate="3/4", K="9" convolutional encoder for performing block interleaving. A scrambling code generating part(23) generates a scrambling code at the speed of 512 Kbps for a traffic channel. The first adding part(24) adds the outputs of the block interleaver(22) and the scrambling code generating part(23). A serial to parallel converter(25) converts a serial signal outputted from the first adding part(24) into a parallel signal. A symbol repetition part(26) regenerates spread symbols outputted from the serial to parallel converter(25). The second and third adding parts(27,28) add the output of the symbol repetition part(26) with Hadamard code and PN(Pseudo Noise) chip rate. The fourth and fifth adding parts(29,30) add the outputs of the second and third adding parts(27,28) with forward link I-channel sequence and Q-channel sequence. A pair of baseband filters(31,32) filter the outputs of the fourth and fifth adding parts(29,30). The first and second multiply parts(33,34) multiply the outputs of the base-band filters(31,32) by cos(2πfc t) value and sin(2πfc t). An accumulation part(35) accumulates the result of the first and second multiply parts(33,34). |
