Abstract:
A radio communication system with adaptive interleaving selects between chip interleaving and bit interleaving depending upon the number of active code signals. A transmitted RF signal includes a coded information signal part and a control signal part that indicates a number of active code signals that have been combined to form the coded information signal part. The system is especially suited for MC-CDMA systems.
Abstract:
A radio communication system with adaptive interleaving selects between chip interleaving and bit interleaving depending upon the number of active code signals. A transmitted RF signal includes a coded information signal part and a control signal part that indicates a number of active code signals that have been combined to form the coded information signal part. The system is especially suited for MC-CDMA systems.
Abstract:
A radio communication system with adaptive interleaving selects between chip interleaving and bit interleaving depending upon the number of active code signals. A transmitted RF signal includes a coded information signal part and a control signal part that indicates a number of active code signals that have been combined to form the coded information signal part. The system is especially suited for MC-CDMA systems.
Abstract:
A base station (101) will instruct relay stations (102) to periodically skip transmissions of their control information when control messaging by all relay stations exceeds a predetermined threshold (e.g., 50% of radio resource capacity). The base station determines the relay stations to skip by periodically ranking the relay stations and skipping control messages for relay stations having a lowest rank.
Abstract:
To provide high-quality communication even when the power for synchronization preamble is reduced in an OFDM communication system, an OFDM communication transmitter obtains a zero amplitude reduced preamble signal by passing a specified synchronization preamble through an ideal low-pass filter (10) to reduce a signal component near zero amplitude within a time domain, and time-multiplexes (11) the obtained zero amplitude reduced preamble signal with transmit data to generate an OFDM transmit signal. A receiver section (20) of the OFDM communication system determines the cross correlation (19) between a receive signal and a specified synchronization preamble (17), which is patterned the same as the counterpart in a transmitter section of the OFDM communication system, and detects a synchronization position in accordance with the determined cross correlation.
Abstract:
A radio communication system (12) with adaptive interleaving (18, 20 or 24) selects between chip interleaving (24) and bit interleaving (18) depending upon the number of active code signals (14). A transmitted RF signal (26) includes a coded information signal part and a control signal part that indicates a number of active code signals that have been combined to form the coded information signal part. The system (12) is especially suited for MC-CDMA systems.