【正文】 Use in CDMA2022 W01 =0 W02 =00 W12 =01 W04 =0000 W24 =0011 W14 =0101 W34 =0110 W08 =00000000 W48 =00001111 W28 =00110011 W68 =00111100 W18 =01010101 W58 =01011010 W38 =01100110 W78 =01101001 ( W016 ,W816) ( W416 ,W1216 ) ( W216 ,W1416 ) ( W616 ,W1416 ) ( W116 ,W916 ) ( W516 ,W1316 ) ( W316 ,W1116 ) ( W716 ,W1516 ) SF=1 SF=2 SF=4 SF=8 SF=16 70 Effects of Using Variable Length Walsh Codes for Spreading SF=16 SF=2 SF=4 SF=8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ? Using Shorter Walsh Codes Precludes Using all Longer Codes Derived from the Original ? Shorter Codes on a Branch map into Longer Codes 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 71 64 4 8 16 32 1 2 9600 19200 38400 76800 153600 307200 614400 Data rate bps Walsh Code Length chips Walsh Code Length Data Rate 72 Long Code Generator Bit Selector (Decimator) MUX and Signal Point Mapping 0 +1 1 1 PC Channel Gain Data Channel Gain Data Channel Gain Puncture PC Sym. (optional) Puncture PC Sym. (optional) Walsh Code Yq Yi MUX Control I Q A ds (t) ds1 (t) Wi (t) ds2 (t) j Wi (t) ds1 (t) ds2 (t) PC Bits 800 bps + or Values From Interleaver Complex Walsh Covering 73 X Y Complex PN Code PN(t) [1+ j] X .PN i(t) PNi (t)] jPNq (t) X . j .PN q(t) = ds1 (t) Wi (t). PN i(t) = ds1 (t) Wi (t). j .PNq(t) Complex PN Code PN(t) [1+ j] S2 Z1 Y . j .PN q(t) = ds2 (t) j Wi (t). j .PNq(t) jPNq (t) S3 S0 S1 Y .PN i(t) = ds2 (t) j Wi (t). PN i(t) PNi (t)] S2 S0 S3 S1 Complex PN Spreading and Mapping Real Sum Imag Sum Zo 74 CDMA2022 1x 原理 CDMA2022 1x 前反向信道結構 75 FL SR1/3 Common Assignment Common Power Control Pilot Common Control Sync Traffic Broadcast Paging (SR1) Quick Paging F Pilot Transmit Diversity Pilot Auxiliary Pilot Auxiliary Transmit Diversity Pilot 01 Dedicated Control 01 Fundamental Power Control /Reverse Pilot 07 Supplemental Code RC 12 02 Supplemental Code RC 39 CDMA2022 Forward Link Channels 76 Tx Data Rates (bps) 20ms Frame RC1 RC2 RC3 RC4 RC5 1200 307200 153600 76800 38400 19200 9600 4800 2400 Rate Set 1 “derived” Walsh Codes W n 256 W n 04 W n 08 W n 16 W n 32 W n 64 W n 128 W n 128 W n 128 r = 1/2 r =1/2 r = 1/2 r = 1/4 r = 1/4 FSCH Walsh Codes vs Data Rates for Radio Configuration 3 77 Tx Data Rates (bps) 20ms Frame RC1 RC2 RC3 RC4 RC5 1200 307200 153600 76800 38400 19200 9600 4800 2400 Rate Set 1 “derived” Walsh Codes W n 256 W n 04 W n 08 W n 16 W n 32 W n 64 W n 128 W n 128 W n 128 r = 1/2 r =1/2 r = 1/2 r = 1/4 r = 1/4 FSCH Walsh Codes vs Data Rates for Radio Configuration 4 78 RL SR1/3 Access RTCH RC 1/2 Enhanced Access Ch Operation RCommon Control Ch Operation RTCH Operation RC 36 RFCH 07 RSCCH RPilot Ch Enhanced Access RPilot Ch RCCCH RPilot Ch 01 RDCCH 01 RFCH 02 RSCH RPower Control SubCh CDMA2022 Reverse Link Channels 79 MUX Pilot (all 0s) PC Bits PC Bits Pilot (all 0s) 384 chips 1 PCG = 4x384 chips = 1536 chips A PC Bits Pilot (all 0s) Reverse Pilot Channel with Reverse