From symbol rate to sample rate fractional ratio

1. What is a symbol in RF?
2. What do you mean by fractional sampling rate conversion?
3. What is sampling rate formula?
4. What is the symbol rate of QPSK?

What is a symbol in RF?

A symbol may be described as either a pulse in digital baseband transmission or a tone in passband transmission using modems. A symbol is a waveform, a state or a significant condition of the communication channel that persists, for a fixed period of time.

What do you mean by fractional sampling rate conversion?

Sampling-Rate Conversion By A Rational Factor

The change of the sampling frequency by a rational factor L/M, sometimes called the fractional sampling rate alteration or resampling, can be achieved by increasing the sampling frequency by L first, and then decreasing by M.

What is sampling rate formula?

The sampling frequency or sampling rate, f_s, is the average number of samples obtained in one second, thus f_s = 1/T. Its unit is sample per second or hertz e.g. 48 kHz is 48,000 samples per second.

What is the symbol rate of QPSK?

Since the symbol rate for QPSK is half of the bit rate, twice the information can be carried in the same amount of channel bandwidth as compared to binary phase shift keying. This is possible because the two signals I and Q are orthogonal to each other and can be transmitted without interfering with each other.