WCDMA3G_DownSample
Description: Extract optimum samples according to path delay timing
Library: 3GPPFDD 10-99, Rake Receiver
Class: SDFWCDMA3G_DownSample
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 |
|
SampleRate |
number of samples per chip |
4 |
S |
int |
[1, 32] |
PathNum |
number of paths or fingers of Rake |
6 |
L |
int |
[1, 16] |
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
Delays |
path delays in terms of samples |
int |
2 |
SmpSig |
received baseband complex envelope signal samples |
complex |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
3 |
ChpSeq |
extracted optimum chip sequence |
multiple complex |
Notes/Equations
- This model is used to extract optimum samples using the path delay timing given by WCDMA3G_PathSearch.
Each firing, S × N tokens are consumed at SmpSig, L tokens are consumed at Delays, N tokens are produced at ChpSeq, where N is the number of chips per slot. ChpSeq depends on PathNum.
References
- 3GPP Technical Specification TS25.211 V3.0.0,"Physical channels and mapping of transport channels onto physical channels (FDD)," October 1999.
- A. J. Viterbi, "CDMA: Principles of Spread Spectrum Communication," Wesley Publishing Company, 1995.