About Trace Data (W-CDMA(3GPP)/HSPA)

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 provides trace data in the Time Domain, Frequency Domain and Code Domain. To accommodate all the available measurement results and display formats; the measurement results are grouped into trace data submenu categories. These submenu categories are grouped together by common measurement result types including Channel (x) "Pre-Demod signal results", CDP "Code Domain Power results", Antenna Comp "Composite signal results" trace data, and Despread "Despread channel results."

Channel (x) trace data

Channel (x) is the pre-demodulated time and frequency (spectrum) data results for the identified VSA input channel (where x = the VSA input channel number).

 

Antenna (x) CDP trace data

CDP (Code Domain Power) trace data provides measurement results for specific Code Layers and the Composite signal. CDP Layer trace data results are derived from all Code Channels within one specified code layer (Spread Code Length/Symbol Rate). CDP Composite trace data results are derived from the composite signal, which includes data from all Code Channels and code layers.

 

Antenna (x) Comp trace data

Antenna Comp (Composite) trace data are measurement results derived from the total or composite signal for the specified antenna port (where x = antenna port number). This includes the combined data from all Code Layers (Spread Code Lengths/Symbol Rates) and Code Channels. The data in these traces comes from the demodulator after the MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. decoder.

 

Despread (x) trace data

Despread channel trace data are measurement results derived from a single Code Channel (Code Channel) within the measured code layer (Spread Code Length (Symbol Rate)).

 

Cross Channel 2x1

 

Cross Channel measurement results for channel 2 referenced to channel 1.

MIMO

 

MIMO trace data provides various MIMO Channel Matrix metric's for the Tx(x)/Rx(x) transmission channels. MIMO Trace data results is only available for Downlink MIMO measurements with 2 (or more) Tx Antennas selected and configured for 2 Input Channels.

For more information about MIMO Trace Data see HSPA+MIMO Measurement Analysis

 

Math

Trace data results derived from a math function

Register

Trace data results derived from Data Register data

No Data

Active trace as empty.

Available Trace Data

Channel (x) Trace Data Despread (x) Trace Data Antenna (x) CDP Trace Data Antenna (x) Comp Trace Data

CCDF

CDF

Correction

Inst Spectrum

PDF

Raw Main Time

Spectrum

Time

 

Error Vector Time

IQ Mag Error

IQ Phase Error

IQ Meas Time

IQ Ref Time

Syms/Errs Table

 

CDE Composite

CDE Layer

CDP Composite

CDP Layer

Code Domain Offsets

Inst CDE Composite

Inst CDE Layer

Inst CDP Composite

Inst CDP Layer

Slot Summmary

 

Error Summary Table

Error Vector Spec

Error Vector Time

Inst Error Vector Spec

Inst IQ Meas Spec

Inst IQ Ref Spec

IQ Mag Error

IQ Phase Error

IQ Meas Spec

IQ Ref Spec

IQ Meas Time

IQ Ref Time

 

Cross Channel 2x1 Trace Data MIMO Trace Data    

Coherence

Cross Correlation

Cross Spectrum

MIMO Info Summary Table    

HSPA+MIMO Trace Date

Refer to HSPA+ MIMO Overview for more information about HSPA+MIMO Measurement Trace Data.

See Also

89600 Series VSA Standard Measurement Data