The QPSK modulators (QPSK_TX) generate modulated signals with the WCDMA chip rate
5 20/40 chip rate
(kehip/s) 2000 300/600 Chip modulation O-QPSK with BPSK with half-sine raised pulse cosine shaping pulse (MSK) shaping RX-TX and TX-RX turnaround time 12 symbols
where total_power is total output (transmit) power in W and chip_rate is chip rate
I found that it was very easy to specify a filter that was too narrow for the 11-Mb/s chip rate
The SoftFone-LCR+ second-generation chipset has been unveiled as part of the 3G product portfolio from Analog Devices, a provider of signal processing solutions, for developers of multimedia mobile handsets based on the 3G TD-SCDMA Low Chip Rate
(LCR) air interface.
This effectively implements a direct sequence spread spectrum (DSSS) scheme with a raw data rate of 250 kbps and a chip rate
of 2 Mchips/s.
The null-to-null bandwidth of the information-carrying digital signal will be twice the bit rate, while the null-to-null bandwidth of the DSSS signal will be twice the chip rate