Wireless communication system, and demodulation method and data rate control method therefor

A wireless receiver for receiving a signal transmitted from a wireless transmitter, comprising:

• an RF module for receiving the signal;
• a demodulator for demodulating the received signal in accordance with one of a plurality of modulation schemes which defines a third number of transmission bits, which is the number of transmission bits per symbol, to be equal to or smaller than a fourth number of transmission bits which is a previously defined maximum number of transmission bits per symbol;
• and
• a decoder for decoding the demodulated received signal,
• wherein information on said fourth number of transmission bits is shared with said wireless transmitter;
• and
• said demodulator outputs said fourth number of transmission bits of the demodulated received signal each time said demodulator demodulates one symbol.

A signal transmission/reception method in a wireless communication system for transmitting a signal from a first wireless station to a second wireless station, wherein said first wireless station and said second wireless station share information on a first number of transmission bits which is a maximum number of transmission bits per symbol, said method comprising the steps of:

• encoding the transmission signal in said first wireless station;
• inputting said encoded transmission signal to a modulator of said first wireless station every said first number of transmission bits;
• modulating in said modulator the encoded transmission signal in accordance with one of a plurality of modulation schemes which define a second number of transmission bits, which is the number of transmission bits per symbol in said first wireless station, to be equal to or smaller than said first number of transmission bits, said modulating step including modulating said second number of transmission bits of the inputted transmission signal and not modulating a number of bits of the transmission signal equal to the difference between said first number of transmission bits and said second number of transmission bits;
• transmitting the modulated transmission signal from said first wireless station to said second wireless station;
• receiving a transmission signal from said first wireless station in said second wireless station;
• demodulating in a demodulator of said second wireless station the received signal in accordance with one of a plurality of modulation schemes which define a third number of transmission bits, which is the number of transmission bits per symbol in said second wireless station, to be equal to or smaller than said first number of transmission bits;
• outputting from said demodulator said first number of transmission bits of the demodulated received signal each time said demodulator demodulates one symbol;
• and
• decoding the demodulated received signal in a decoder of said second wireless station.