Method and device for feeding back and receiving downlink channel information

A method for feeding back downlink channel information, comprising:

• spreading, by a wireless terminal, spectrum of the downlink channel information;
• and
• transmitting to a network side the spectrum-spread downlink channel information after having been superposed to a user information sequence of the wireless terminal, or transmitting to the network side the spectrum-spread downlink channel information through wireless resource used by another wireless terminal to transmit its user information sequences,
• wherein further comprising:
• before superposing the spectrum-spread downlink channel information to the user information sequence of the wireless terminal, converting the user information into a parallel signal having a width equal to a spectrum-spread code length used in spreading the spectrum;
• and
• after the superposition is completed, converting the parallel signal into a serial signal.