摘要:
Various methods and apparatuses for beacon transmission in an ad-hoc peer-to-peer network are disclosed. In one aspect, an apparatus for communication is disclosed, the apparatus comprising a processing system configured to determine device-independent beacon data, determine device-dependent beacon data, and to spread the device-dependent beacon data using one or more spreading codes anda transmitter configured to transmit one or more beacons during a beacon transmission period, wherein each beacon comprises the device-independent beacon data and the spread device-dependent beacon data.
摘要:
A wireless communications network uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode.
摘要:
Physical downlink channels PPHYl, PHY2 are summed in a summation unit 10. The output of summation unit 10 is forwarded to another summation unit 12, where it is combined with the primary and secondary synchronization channels P-SCH, S-SCH. The secondary synchronization channel S-SCH is formed as in WCDMA. The primary synchronization channel P-SCH is formed by connecting a switch SW either to a code generator 14 generating the conventional code PSCWCDMA or a code generator 18 generating the code PSCNEW. The selection is controlled by a PSC controller 18. This controller can be adapted to produce a P-SCH in accordance with one of several formats. PSCNEW has the properties that it is a hierarchical Golay sequence constructed by a plurality of constituent sequences with at least one of the constituent sequences being the Golay sequence, and that it is orthogonal to the primary and secondary synchronization codes used in non-MBSFN capable WCDMA.
摘要:
The present invention relates to a method and an apparatus for spread spectrum modulation and demodulation using a special spread spectrum sequence, characterized in that Golay complementary codes are modulated onto orthogonal channels such that a corresponding complex complementary code is obtained. The signal spread by such complex complementary code has a low peak-to-average power ratio, a sound self-correlation property and cross-correlation property, which can well solve the problem of multi-access interference such that the communication performance of the entire system is improved.
摘要:
The invention relates to a method of generating synchronization sequences that are based on partial sequences of signals (Golay sequences). According to said method, the second partial sequence of signals is repeated and is thereby modulated by the first partial sequence of signals.
摘要:
Méthode de synchronisation de stations de base dans un système de télécommunication radiomobile, selon laquelle une première station de base transmet une séquence de synchronisation comprenant une première séquence suivie d'une seconde séquence, lesdites première et seconde séquences formant un couple de séquences complémentaires, et au moins une seconde station de base effectue la corrélation de ladite séquence de synchronisation avec une réplique de la première séquence et une réplique de la seconde séquence, les résultats de corrélation étant ensuite sommés pour donner un signal de corrélation fournissant une information de synchronisation. La première séquence est séparée de la seconde séquence par un intervalle de séparation de longueur prédéterminée (2GP, 2E), de sorte que le signal de corrélation présente un pic de corrélation isolé dans une fenêtre temporelle.
摘要:
Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus may generally include a processing system configured to generate a frame comprising a first sequence and a conjugate of the first sequence; and an interface configured to output the frame for transmission to a wireless node, wherein the first sequence and the conjugate of the first known sequence are simultaneously transmitted via first and second transmit chains. The first sequence maybe known by the wireless node prior to the transmission.
摘要:
A wireless communications network uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode.