53results about How to "Reduce packet error rate" patented technology

The invention relates to an antenna arrangement for vehicle-to-vehicle communication, wherein at least two antenna transmitters (12, 13), each having a unidirectional directional diagram, are positioned in such a manner that a combination of the unidirectional directional diagrams of the antenna transmitters generates a largely omnidirectional directional diagram by means of a method for transmitting and / or receiving.

Embodiments relate to a controller for a participant of a communications system, wherein the communications system wirelessly communicates in a frequency band which is used by a plurality of communications systems for communication, wherein the controller is designed to determine a channel access pattern, wherein the channel access pattern specifies a frequency- and / or time-hop-based allocation of the frequency band which can be used for the communication of the communications system, wherein the controller is designed to determine the channel access pattern according to individual information of the communications system and according to a status of a number sequence generator for generating a number sequence or a number of a number sequence.

The invention includes a system for eliminating interference of adjacent base station and method thereof. The method includes: performing packetization, interleaving and repetition to the initial datablock to generate a logic data block, performing permutation to the logic data block to generate a physical data block, and transmitting the physical data block; receiving the physical data block, performing inverse-permutation and de-interleaving to the physical data block to obtain the logic data block, performing separation and estimation to the physical channel of the target base station andadjacent base station through the leading symbol or the pilot frequency symbol, performing inverse- permutation and de-interleaving to the physical channel to obtain the channel, constructing the estimated logic channel matrix through the estimated logic channel, calculating the weight coefficient based on the estimated logic channel matrix, equalizing the logic data block by using the weight coefficient, to obtain the equalized logic data block, performing reduction to the equalized logic data block to obtain the initial data block. By adoption of the invention, the interference of adjacent base station in the communication system is eliminated, and reliability of the communication system is improved.

A joint spectrum access and power control method in D2D tactile communication, relating to the technical field of wireless communication. The present invention randomly accesses a resource block for each D2D pair according to a contention-based spectrum access mechanism; calculates the packet error rate of the D2D forward link under the contention access mechanism, that is, the source end to the destination end; calculates the contention access mechanism Lower the packet error rate of the D2D reverse link, that is, from the destination end to the source end; calculate the packet error rate of the closed loop of D2D tactile communication; establish an optimization problem, that is, minimize the total packet error rate of the system; model the optimization problem as a game ; Use the synchronous log-linear learning algorithm to solve the game Nash equilibrium. Reasonable power control can coordinate the interference between users, effectively unload resource scheduling delay and reduce the error probability of data packet transmission, so as to meet the delay and reliability requirements of D2D tactile communication.

The invention relate to a medium control method for supporting cooperated communication in wireless local area network, belonging to the wireless local area network transmission technology field. The invention judges whether a relay node is available by controlling frame triangle interaction, if yes, adopts triangle data transmission mode according to the advanced estimation to packet error rate simultaneously. The invention preserves the advantages of conventional MAC protocol, and increases the saturation throughput of whole network by cooperated supporting and cooperated communication whenthe packet error rate is high, reduces average time-delay and packet loss rate. The invention preserves the backoff process of IEEE802.11b, so achieves the same fairness performance asIEEE802.11b. the invention is used in wireless local area network, achieves the advantages of little protocol modification and excellent performance improvement. When the channel fading is obvious, the invention caneffectively improve wireless network performance; and when the packet error rate is high, the invention can increase the throughput by about 17%, and reduce the packet loss rate to less than 1 / 10 of original value.