Abstract: A first detector receives a received signal and extracts the data signals from the received signal. A hard decision converter converts soft symbols outputted by the first detector into hard symbols. An interference canceller extracts the voice signals from the received signal. A second detector is connected to the output of the interference canceller, and extracts the individual voice signals. The second detector is a different detector type than the first detector.

Abstract: A code division multiple access base station is used in receiving a plurality of data signals over a shared spectrum. Each received data signal experiences a similar channel response. A combined signal of the received data signals is received over the shared spectrum. The combined signal is sampled at a multiple of the chip rate. A channel response is estimated. A column of a channel correlation matrix is determined using the estimated channel response. A spread data vector is determined using the determined column, the estimated channel response, the received combined signal and a fourier transform. Data of the data signals is estimated using the spread data vector.

Abstract: An optical interconnect comprises an input configured to receive light of a plurality of light wavelengths and a plurality of holographic optical elements. Each element configured to reflect one out of the plurality of light wavelengths and allowing others of the plurality of wavelengths to not be reflected. Each of a plurality of prisms is configured to rotate received light at a different angle than any of the other prisms. For each holographic optical element, one of the plurality of prisms is positioned to receive and rotate light reflected by that holographic element. Each of a plurality of beam splitters is positioned to receive light rotated by a respective one of the plurality of prisms and all the plurality of beam splitters direct light to an output of the optical interconnect.

Abstract: A base station transmits access control signals on a periodic basis having a first transmission rate. The base station transmits access control modification signals at a second transmission rate higher than the first transmission rate. The user equipment transmits an access attempt signal. The access attempt signal requests the base station to permit the user equipment access to the channel. The user equipment receives the transmitted access control signals and access modification signals. A wait period is determined based on in part the received access control signals and access control modification signals. In response to an unsuccessful access attempt, the user equipment delays transmitting a subsequent access attempt signal for the wait period.

Abstract: A code division multiple access communication system has a plurality of base stations. Each base station transmits a primary synchronization code (PSC) in a primary synchronization channel (PSCH). A user equipment monitors the PSCH and correlates the PSCH with the PSC. Using a result of the PSC correlation, PSCH locations are identified having a PSC peak. For each identified PSCH location, a quality factor comprising a shape factor associated with that location's PSC peak is determined. For each identified PSCH location, that identified PSCH location and the quality factor is stored. The PSCH locations and quality factors are accumulated over a number of frames and are processed using logic at algorithms to produce a reliable PSC detection.

Abstract: A base subunit receives a signal over a first frequency. A plurality of despread voice signals are produced using the received signal. The despread signals and a voice signal generated at the base subunit are combined. The combined signal is mixed with a chipping sequence. The mixed combined signal is transmitted at a second frequency.

Abstract: A method enabling a wireless remote terminal (UE) to access a universal mobile telecommunication system (UMTS) through a wireless local area network (WLAN) wherein UMTS services are transmitted to a format converter from a UMTS transceiver and the format converter changes the format of received messages to a WLAN format before transmission to the UE which is operating in the WLAN mode.

Abstract: A circuit is capable of performing a complex division and dual complex multiplication. The complex division involves dividing a first complex value by a second complex value and the dual complex multiplication involves multiplying a third complex value by a fourth complex value and a fifth complex value by a sixth complex value. The circuit comprises a first input configured to receive the first and second complex values when the circuit is performing the complex division and the third and fourth complex values when the circuit is performing the dual complex multiplication. A second input is configured to receive the second complex value when performing the complex division and the fifth and sixth complex values when performing dual complex multiplication. A first output produces a result of complex multiplication of the third and fourth complex values when the circuit is performing the dual complex multiplication.

Abstract: Physical channels of a user service experiencing high interference levels are to be reassigned in a hybrid time division multiple access/code division multiple access communication system. Time slots of the user service are ordered in a descending order of the measured interference. The user service physical channels in each time slot are sequentially evaluated and reassigned in the time slot order in a descending order of a desired reception quality of each physical channel of the user service.

Abstract: The present invention is for a receiver incorporated into User Equipment (UE) or base stations of a code division multiple access (CDMA) communication system. The UE and base station are in communication with one of the plurality of base stations and receives a communication signal through the receiver. The communication signal is correlated using a delay locked code tracking loop, that estimates and tracks a channel delay. The tracking loop comprises a reference code generator and an interpolator for generating timed signal versions in response to said communication. A timed signal correlator, included in the tracking loop for correlating at least two of the timed signal versions with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization loop (APN), that is responsive to the interpolator, generates a power error signal that normalizes the error signal through a normalization circuit.

Abstract: The present invention provides a base station architecture that is modular in configuration, lowering the initial cost of implementing a new CDMA telecommunication system for a defined geographical region while allowing for future capacity. The scalable architecture is assembled from a digital base station unit that is configured to support a plurality of simultaneous wireless calls connecting to a conventional public switched telephone network. For initial startup, two base station units are deployed for redundancy in case of a single failure. Additional base station units may be added when the need arises for extra traffic capacity. If sectorization is required, the base station units may be directionally oriented. Coupled to and remote from each base station unit are two amplified antenna modules that contain an omni-directional or an external directional antenna, a high power RF amplifier for transmitted frequencies and a low noise amplifier for received frequencies.

Abstract: A scan cell circuit for use in an integrated circuit chip is disclosed. The scan cell circuit includes a multiplexer receiving a first signal, a second signal and a selection signal, and outputting one of the first signal and the second signal in response to the selection signal, and a host circuit electrically connected to the multiplexer, receiving and processing an output of the multiplexer, and proceeding an optional output from a first output end and/or a second output end. When the multiplexer selects the second signal to be outputted in response to a specific state of the selection signal, the first signal output end is fixed at a constant level according to the specific state of the selection signal.

Abstract: Multi-thread video data processing for use in a computer video display system. The parameters of vertex data are grouped into a plurality of groups. The computation needs of each group are broken down into several arithmetic operations to be performed by corresponding arithmetic units. The units concurrently process the vertex data.

Abstract: A memory module storing therein boot codes, a core logic device capable of distinguishing such memory module from the other memory modules of the same module specification, and a method for realizing the boot codes from the memory module storing therein the boot codes are disclosed. All the memory modules are electrically connected to the core logic device via respective signal pins, but the memory module storing therein boot codes outputs an identifying signal different from the identifying signals outputted by the other memory modules in a booting process. Therefore, the core logic device can locate the memory module storing therein the boot codes, and the host device can accomplish the booting process by reading the boot codes from the specific memory module.

Abstract: A simple and effective coherent radiation device generates laser-like radiation from an optical parametric oscillator (OPO) that is formed by a dielectric-modulation structure in a nonlinear optical material. The nonlinear optical material used in the OPO can be a birefringence phase-matched material or a quasi-phase-matched material.

Abstract: A user equipment (UE) for multiplexed scheduling of information blocks from multiple sources on a single communication channel divided into multiple address positions. The information block from each source has a repetition period and is divided into a number of segments. The UE includes determining the total number of positions on the channel to be scheduled; mapping positions in a non-sequential order corresponding to nodes in a binary tree, whereby each layer of the binary tree corresponds to a repetition period; ordering the blocks by repetition period, starting with the smallest repetition period; assigning information segments of each block to unassigned positions; and marking as assigned all child nodes of the assigned position node in the layer corresponding to the repetition period.

Abstract: The invention provides a system which monitors and controls upstream path congestion by utilizing a MAC layer protocol wherein an upstream communication cell is transmitted from a settop box to the headend. The upstream cell contains a message field and a retry count. The retry count is incremented upon failure of each attempt to communicate with the headend within the upstream path. A downstream cell from the headend to the settop terminals contains an acknowledgment field and an optional power control field. Upstream path congestion is monitored by the headend through averaging or other suitable monitoring all of the retry count field data which arrives from the network of settop terminals.

Abstract: A method for differential phase evaluation of M-ary communication data is employed in which the data consists of N sequential symbols r1 . . . rN, each having one of M transmitted phases. Selected sequences of N?1 elements that represent possible sequences of phase differentials are evaluated using multiple-symbol differential detection. Using r1 as the reference for each phase differential estimate, sN?1 phase differential sequences are selected in the form (P2i, P3i, . . . , PNi) for i=1 to s for evaluating said symbol set, where s is predetermined and 1<s<M. Each set of s phase differential estimate values are chosen based on being the closest in value to the actual transmitted phase differential value. These s phase differential estimates can be determined mathematically as those which produce the maximum results using conventional differential detection.

Abstract: The invention relates to a backflow preventing check valve (1) comprising a housing (2) in which a closing member (3) is arranged. The closing member is moveable between a closed position and an open position and is disposed on a valve seat with a sealing area in the closed position. A pressure-compensation device is provided for when the backflow preventing check valve is closed and a volume of fluid is sealed off on the outflow side. In order to counteract an undesireable high pressure load when the check valve is closed, the outflow area defined by the closing body (3) in a closed position is joined to at least one pressure compensation chamber (6) whose receiving volume corresponds approximately to the expansion volume of the sealed-off fluid and which is disposed outside the area which is defined on the outflow side.