Method and system for providing code cover to ofdm symbols in multiple user system

A transmitter in a multiple user system, comprising:

• a reference sequence generator to generate a reference sequence for each of a plurality of data sequence of each of a plurality of users, wherein each of the reference sequence is multiplied with a user specific code cover;
• a time multiplexer to time-multiplex each of the reference sequence with corresponding data sequence, to generate a corresponding multiplexed sequence;
• a Discrete Fourier Transform (DFT) spread unit to perform a Discrete Fourier Transform (DFT) on each of the multiplexed sequence to generate a corresponding DFT-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbol;
• and
• a post processor to process each of the DFT-s-OFDM symbol for transmitting over corresponding one or more channels.

A method for receiving Orthogonal Frequency Division Multiplexing (OFDM) signals in a multiple user system, comprising:

• receiving, by a receiver, an analog time-multiplexed signal from a plurality of users using one or more antennas associated with the receiver;
• converting, by the receiver, the analog time-multiplexed signals into a corresponding digital time-multiplexed signals;
• performing, by the receiver, a Fast Fourier Transform (FFT) on the digital time-multiplexed signal to produce corresponding frequency domain time-multiplexed signal;
• mapping, by the receiver, the frequency time-multiplexed signal to one or more sub-carriers for generating corresponding mapped signals;
• performing, by the receiver, Inverse Discrete Fourier Transform (IDFT) on the corresponding mapped signals to generate corresponding time domain mapped signal;
• and
• demultiplexing, by the receiver, the corresponding time domain mapped signals to isolate at least one reference sequence from at least one data sequence, wherein the at least one reference sequence comprises a code cover corresponding to each of the plurality of users.

A receiver comprising:

• an Analog to Digital Converter (ADC) to:
• receive an analog time-multiplexed signal from a plurality of users, using one or more antennas associated with the receiver;
• and
• convert the analog time-multiplexed signals into a corresponding digital time-multiplexed signals;
• a Fast Fourier Transform (FFT) unit to perform a Fast Fourier Transform (FFT) on the digital time-multiplexed signal to produce corresponding frequency domain time-multiplexed signal;
• a carrier mapping unit to map the frequency time-multiplexed signal to one or more sub-carriers for generating corresponding mapped signals;
• an Inverse Discrete Fourier Transform (IDFT) unit to perform Inverse Discrete Fourier Transform (IDFT) on the corresponding mapped signals to generate corresponding time domain mapped signal;
• and
• a de-multiplexer to demultiplex the corresponding time domain mapped signals to isolate at least one reference sequence from at least one data sequence, wherein the at least one reference sequence comprises a code cover corresponding to each of the plurality of users.