Comp Error Vector Time (W-CDMA(3GPP)/HSPA)
When 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) Demodulation is enabled, the composite trace data is the error vector time domain data for the composite signal.
The trace data is computed from the first slot in the Measurement Interval after the Measurement Offset (see Measurement Interval and Offset).
Concept Information
This trace data is identical to the Despread Channel Chan Error Vector Time for concept information.
trace data except that the source data is the composite signal. SeeSee Also