Channel/Layer tab (W-CDMA(3GPP)/HSPA)
The Channel/Layer tab of the W-CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95.(3GPP)/HSPA Demodulation Properties dialog box specifies the measurement Despread Channel and CDP (code domain power) code Layer for analysis. For MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. analysis Trace Data, see the property.
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Despread Channel parameters: Despread Channel parameters specify the channel used for the despread channel measurement trace data results, which include: Error Vector Time, IQ Meas Time, IQ Ref Time, Mag Error, Phase Error, and Syms/Errs trace data:
- Spread Code Length
- Code Channel
- Despread Traces (Downlink and HSPA+MIMO analysis only)
- IQ Branch (Uplink only)
- Modulation Scheme (HSPA only)
- tDPCH parameters (Downlink only)
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tHS-DPCCH parameters (HSPA Uplink only)
- Code Location
- Value
- Decode Channel Type
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CDP Layer parameters are used to specify the active (displayed) code domain layer for the Code Domain Power (CDP) Layer and Code Domain Error (CDE) Layer trace data:
See Also
Advanced tab (W-CDMA (3GPP)/HSPA Demodulation Properties)
Format tab (W-CDMA (3GPP)/HSPA Demodulation Properties)
Test Mode tab (W-CDMA (3GPP)/HSPA Demodulation Properties)
