Composite Error Summary (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, selecting the trace data shows the composite error summary data. This is the signal quality error summary information for the composite signal.
For more information see the following topics:
Composite error summary data is always computed from the first Slot in the measurement and ignores the measurement-offset parameter.
There is also channel error summary trace data (), which provides the error information for a specific Code Channel and code layer (see About Channel Error Summary Data).
See Also
