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WCDMA signal bandwidth

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brmadhukar

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wcdma bandwidth

The signal bandwidth for the W-CDMA system is set at 5 MHz. This high bandwidth allows the received signal to be split into distinct multipaths with high resolution.

What does this mean?

TIA
B R M
 

wcdma chip rate

That simple the principle of CDMA. The higher the bandwidth --> W-CDMA, the more resolution or channels you have, respectivley..
 

bandwidth of wcdma signal

Hi,
How do you get more resolution between the channels. The chipping rate is fixed at 3.84MHz. That was the question.
B RM
 

signal bandwidth

just my 2cents:

greater bandwidth ==> highest sample rate ==> greater 'time resolution'

so, for example, if you have 5Mhz BW and your sample rate is 10Msps then, you can resolve multipaths delayed 100ns (1/sample rate). So you can take the benefits of a great number of multipaths (using the RAKE receiver) than a system with minor bandwidth.

regards
 

wcdma rrc filter

Hi,
Suppose I have 1.25MHz bandwidth, I can still sample at 10MHz right? Then how?
TIA
B R M
 

wcdma band width

Resolution depends on the chip rate. In WCDMA the chip rate is Rc=3.84 Mcps. hence, the chip duration is 1/Rc=0.26 usec. Hence, the receiver can resolve (i.e, distinguish) any two paths with relative delay > 0.26 usec. This is done using the code matched filter.

The bandwidth depends on the pulse shaping filter used. The root raised cosine filter used in WCDMA gives a 5 MHz bandwidth.
 

chip rate wcdma

You have to consider spectral efficiency.
i.e. Spectral efficiency = Signal bandwidth/ Chip rate.

Here signal bandwidth is 5 MHz and chip rate is 3.84 Mcps.
 

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