252results about "Code shifting or hopping" patented technology

The present invention is related to a statistical multiplexing method and apparatus using a multi-dimensional orthogonal resource hopping multiplexing method in a wired / wireless communication systems where a plurality of communication channels, which are synchronized through a single medium, coexist. The present invention, in order to implement a generalized statistical multiplexing communication system using a multi-dimensional orthogonal resource hopping multiplexing method, comprises a multi-dimensional hopping pattern generator which is located in the primary communication station, a data symbol modulator that modulates data symbols based on the corresponding orthogonal resource hopping pattern generated by said multi-dimensional hopping pattern generator, a collision detector and controller that detects whether a collision occurs or not between the multi-dimensional hopping patterns and compares the consistency of the data symbols toward the secondary communication stations between said collision interval, a transmission power controller that controls the transmission power of the remaining parts excluding the parts where the multi-dimensional hopping patterns collide and the transmission is stopped due to transmitting data symbol inconsistency and compensates for the loss in the average reception energy due to a transmission stoppage.

A base station apparatus is used in a mobile communication system that uses an OFDM scheme in a downlink. The base station apparatus includes: a unit configured to perform inverse Fourier transform on a signal in which a first signal and a second signal is mapped to subcarriers with different transmission power density, and to generate a transmission signal; and a transmission unit configured to transmit the transmission signal to a user apparatus. A subcarrier (prohibited subcarrier) in which mapping of the second signal is prohibited is determined such that transmission power density of the second signal is kept constant among a plurality of OFDM symbols regardless of whether the first signal is included in an OFDM symbol including the second signal. The prohibited subcarrier is determined based on a subcarrier to which the first signal is mapped.

A method of transmitting a control signal in a wireless communication system is provided. The method includes acquiring a resource index, the number of cyclic shifts (CSs) and a CS interval, wherein the number of CSs is an integer multiple of the CS interval, determining a CS index based on the number of CSs and the CS interval, generating a cyclically shifted sequence by cyclically shifting a base sequence by a CS amount obtained from the CS index, generating a modulated sequence based on the cyclically shifted sequence and a symbol for a control signal and transmitting the modulated sequence after mapping the modulated sequence to a resource block obtained from the resource index.