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WCDMA3G_ChEstimate


Description: Path parameter estimate aided by pilot symbols
Library: 3GPPFDD 10-99, Rake Receiver
Class: SDFWCDMA3G_ChEstimate
Derived From: WCDMA3G_RakeBase

Parameters
Name Description Default Sym Type Range
ChipRate chip rate of system: Chip Rate 3.84Mcps Chip Rate 3.84Mcps   enum  
LinkDir link direction: Downlink, Uplink Downlink   enum  
PilotType basic pilot type: Multiplex Pilot, Downlink Common Pilot Multiplex Pilot   enum  
DL_DPCHType downlink dedicated physical channel: DPCH_15kbps_TF0_T2_P4, DPCH_15kbps_TF2_T2_P4, DPCH_30kbps_TF0_T2_P2, DPCH_30kbps_TF2_T2_P2, DPCH_30kbps_TF0_T2_P4, DPCH_30kbps_TF2_T2_P4, DPCH_30kbps_TF0_T2_P8, DPCH_30kbps_TF2_T2_P8, DPCH_60kbps_TF0_T2_P4, DPCH_60kbps_TF2_T2_P4, DPCH_60kbps_TF0_T2_P8, DPCH_60kbps_TF2_T2_P8, DPCH_120kbps_TF8_T4_P8, DPCH_120kbps_TF0_T4_P8, DPCH_240kbps_TF8_T4_P8, DPCH_240kbps_TF0_T4_P8, DPCH_480kbps_TF8_T8_P16, DPCH_480kbps_TF0_T8_P16, DPCH_960kbps_TF8_T8_P16, DPCH_960kbps_TF0_T8_P16, DPCH_1920kbps_TF8_T8_P16, DPCH_1920kbps_TF0_T8_P16, PCCPCH DPCH_30kbps_TF2_T2_P8   enum  
UL_DPDCHType uplink dedicated physical data channel: DPDCH_15kbps, DPDCH_30kbps, DPDCH_60kbps, DPDCH_120kbps, DPDCH_240kbps, DPDCH_480kbps, DPDCH_960kbps DPDCH_30kbps   enum  
UL_DPCCHType uplink dedicated physical control channel: DPCCH_15kbps_P6_TF2_F0_T2, DPCCH_15kbps_P8_TF0_F0_T2, DPCCH_15kbps_P5_TF2_F1_T2, DPCCH_15kbps_P7_TF0_F1_T2, DPCCH_15kbps_P6_TF0_F2_T2, DPCCH_15kbps_P5_TF2_F2_T1 DPCCH_15kbps_P6_TF2_F0_T2   enum
DL_TXDiversity transmit diversity in downlink: No_Diversity, DL_STTD No_Diversity   enum  
PathNum number of paths or fingers of Rake 6 L int [1, 16]
DPCHNum number of DPCHs 1   int [1, 16]
EstMethod estimation method based on DPCH: Averaging, Interpolation, WMSA, NoEst Interpolation   enum  
WMSASlotNum number of slots for WMSA method 1 K int [1, 8]
WFactors weighting factors used in WMSA method 1.0 1.0   real array (0, 1]
† where
TFn = number of transmit format indicator bits
Tn = number of transmit power control bits
Pn = number of pilot bits
Fn = number of feedback indicator bits

Pin Inputs

Pin

Name

Description

Signal Type

1

SymCH1

despread signals of the first code channel in downlink,
Common Pilot Channel in downlink or the DPCCH in uplink
of current slot

multiple complex

Pin Outputs

Pin

Name

Description

Signal Type

2

CHEst

estimation of path parameter of current slot based on
DPCCH or CPICH

multiple complex

Notes/Equations
  1. This model is used to estimate path characteristics aided by pilot symbols of DPCH, CPICH in downlink or DPCCH in uplink.
    Each firing, N tokens are consumed at SymCH1, and M tokens are produced at CHEst, where N is the symbol number of DPCH or CPICH in downlink based on PilotType or DPDCH in uplink per slot, M is the symbol number of DPCH in downlink or DPDCH in uplink per slot.

References
  1. 3GPP Technical Specification TS25.211 V3.0.0, "Physical channels and mapping of transport channels onto physical channels (FDD)," October 1999.
  2. S.Tanaka, M.Sawahashi, and F.Adachi, "Pilot Symbol-Assisted Decision-Directed Coherent Adaptive Array Diversity for DS-CDMA Mobile Radio Reverse Link," Proc. Wireless'97, Canada, July 1997.
  3. Y.Honda, K.Jamal, "Channel Estimation based on Time-Multiplexed Pilot Symbols," IEICE Technical Report RCS96-70, August 1996.
  4. A. J. Viterbi, "CDMA: Principles of Spread Spectrum Communication," Wesley Publishing Company, 1995.
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