chip rate


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chip rate

In direct sequence spread spectrum technologies such as DSSS and CDMA, it is the number of bits per second (chips per second) used in the spreading signal. A different spreading signal is added to the data signal to code each transmission uniquely. The number of chips (bits) in the spreading signal is significantly greater than the data bits. Chip rate is measured in "megachips per second" (Mcps), which is millions of chips per second. See spread spectrum, CDMA and 802.11.
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The QPSK modulators (QPSK_TX) generate modulated signals with the WCDMA chip rate of 3.
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 in Hz.
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.