186 results about "Channelized" patented technology

Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.

The invention discloses a broadband channelization reception system of radar with an external radiation source and an FPGA (Field Programmable Gate Array) implementation method. The FPGA implementation method comprises the steps of: dividing received radar broadband signals into multiple paths of analogue signals through a power division filter module; transmitting each path of analogue signals after AD (Analogue-Digital) conversion into an FPGA for frequency point separation; converting to a baseband through down-conversation in the FPGA; sequentially carrying out a multi-phase structured deceleration treatment, channelization treatment, FIFO (First In First Out) series and parallel conversion treatment and FFT (Fast Fourier Transformation) on baseband signals; and finally outputting output signals of any eight frequency points through the FPGA. The reception system comprises a power division filter module, an analogue-digital conversion module and an FPGA frequency point separation module. According to the invention, echo signals of the radar are subjected to a segmental treatment, and the same treatment is adopted for the signal separation process of each path of the analogue signals after the segmentation. Different clock frequencies are adopted at different treatment stages of the FPGA frequency point separation. According to the broadband channelization reception system of the radar with the external radiation source and the FPGA implementation method, disclosed by the invention, the difficulties of great equipment amount and high development cost when the traditional reception system of the radar with the external radiation source implements synchronous reception of multiple signals of the broadband signals are solved; and complexity and cost of the system structure are decreased.

A communications network for transporting data packets among L2 / L3 nodes based on dynamically L1-channelizable multi-source buses. The dynamic channelization of a packet transport bus among source-node-specific L1 connections is managed by a bus control process, which periodically optimizes the allocation of bus capacity pool among the source nodes based on real-time bus capacity demand figures by the source nodes of the bus. The invention provides means for real-time dynamic, traffic load adaptive allocation of transport network capacity to continuously maximize the data throughput of the transport network for dynamic packet traffic, such as Internet traffic.

A data communications device interconnected for channelized communication overcomes the problems associated with message traffic starvation on outgoing traffic channels by forming arbitration, or speed groups of logical interfaces and allocating scheduling resources in proportion to the bandwidth attributed to each group relative to the total bandwidth of the device. Incoming messages have a transmission rate based on QOS, content type, or other constraints. A categorizer determines arbitration groups of the outgoing messages based on the transmission rate of the message. The scheduler allocates dequeue requests among the groups according to the proportion allocated to the arbitration group. A dequeue manager drains the outgoing messages from the arbitration groups at a rate in proportion to the total percentage of outgoing transmission bandwidth represented by the group by selecting a message from among the arbitration groups according to the computed proportion.

A mobile communication system, base station device, and mobile wireless terminal are provide which are capable of improving throughput and / or communication quality in the mobile wireless terminal when an HSDPA (High Speed Downlink Packet Access) method is applied to W-CDMA (Wideband Code Division Multiple Access) communication. A base station device transmits an empty pattern of a channelization code set for an HS-SCCH (High Speed Shared Control CHannel), which is used as an advance notice of transmission for a downlink employed in the HSDPA method, to the mobile wireless terminal. The mobile wireless terminal, when having received the advance notice of transmission for the downlink employed in the HSDPA method from the base station device, adds assumed power for transmission of the HS-DPCCH (High Speed Dedicated Physical Control CHannal) data to the estimated transmission power value to be used for judgement as to whether a TFC (Transport Format Combination) of a DPCH (Dedicated Physical CHannel) is usable or not.

Methods and devices are provided for implementing two types of sub-channel arrangements. A first type of sub-channel arrangement involves defining a first traffic portion and a second traffic portion of a transmission resource, transmitting broadcast traffic on at least one first antenna of a plurality of antennas in the first traffic portion using a first sub-channelization, transmitting multicast traffic on at least one second antenna of the plurality of antennas, the at least one second antenna being distinct from the at least one first antenna, in the first traffic portion using a second sub-channelization, and transmitting unicast traffic on at least one antenna of the plurality of antennas in the second traffic portion using a third sub-channelization. A second type of sub-channel arrangement involves defining a first traffic portion and a second traffic portion, wherein for a portion of the transmission resource, a portion of the first traffic portion overlaps with a portion of the second traffic portion. In the portion of the transmission resource in which a portion of the first traffic portion overlaps with a portion of the second traffic portion, the channel arrangement involves transmitting broadcast / multicast traffic on at least one first antenna of a plurality of antennas using a first sub-channelization and b) transmitting unicast traffic on at least one second antenna of the plurality of antennas, the at least one second antenna being distinct from the at least one first antenna, using a second sub-channelization. The first, second and third sub-channelizations may be based on either one of or a combination of FDM sub-channelization and TDM sub-channelization.

The invention is applied to the technical field of radio electronics and Telecommunications, and particularly relates to a multi-signal detecting method for a broadband. The multi-signal detecting method for the broadband comprises the following steps of: a. collecting signals of ADC (analog to digital converter) at a high speed; b. carrying out non-blind area digital channelization to the collected signals; c. splicing and computing the broadband frequency spectrum of the signals subjected to non-blind area digital channelization, and obtaining the frequency spectrum; and d. carrying out multi-signal detection to the spliced frequency spectrum. By adopting the multi-signal detecting method, detection of communication signals of the broadband is realized; and as for a typical multi-communication-signal broadband application condition in which the signal to noise ratio is 12 dB and the broadband is 1 GHz (gigahertz), the detecting time is only 200 milliseconds, the detection probability is higher than 95 percent, and the false-alarm probability is lower than 1 percent.

A method for informing a mobile device of adjacent sites in a RF communication system is disclosed. The RF communication system comprises a first network and a second network. At a site in the second network of the RF communication system, information is maintained of adjacent sites wherein the adjacent sites are within the first network, and a first list of adjacent sites is broadcast to at least one mobile device within coverage of the site in the second network.

A communication system includes a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal. The system generates a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigns the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets. Upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs, a Node B determines to modify a control channel set assigned into the UE to a new control channel set at a predetermined point of time to come. After determining to modify the control channel set, the Node B transmits an indicator indicating expected modification of the control channel set and information on the control channel set to be modified to the UE over a downlink.

The present invention is to provide a communication channel with a low inter-cell interference while suppressing variation in the amount of inter-cell interference. Provided is a base station arranged in a radio communication system configured to implement a frequency division multiple access method by using a frequency division multiplexing method as a modulation method, and configured of cells each divided into an inner region and an outer region. The base station includes an allocation controller configured to perform subchannelization using a perfectly-orthogonal channel in the outer region of the cell, and to perform subchannelization using a quasi-orthogonal channel in the inner region of the cell.

Provided are an uplink control information transmission method, a user equipment, and a network-side device. The uplink control information transmission method of the present invention comprises: determining a destination code channel from multiple preset code channels; and sending uplink information to a network-side device through the destination code channel, the uplink information comprising first information and second information, an information bit transmitted through the destination code channel bearing the first information, and a channelization code of the destination code channel bearing the second information. The embodiments of the present invention improve the uplink throughput of a UE.

The invention discloses an ultra-wideband receiver device based on microwave photons and a design method. A light-operated beam forming function module and a light channelization function module are connected through light transmission by a light wavelength division multiplexing technology, so the process of broadband receiving of microwave radio-frequency signals through light domain processing is realized. Microwave signals of different antenna columns are modulated to optical carriers with different wavelengths, and different delay paths are selected through optical wavelength switching torealize different beam directions; radio frequency signal information of different lines is carried through a multi-wavelength optical frequency comb, and the radio frequency signal information is directly transmitted into a microwave photon channelization module in an optical mode. In the module, light with different wavelengths is distributed to different channelization units through wavelengthdivision demultiplexing, intermediate frequency channelization signals of corresponding columns are obtained through the different channelization units and finally combined together, and the purpose of beam forming is achieved. The microwave photon ultra-wideband receiver device provided by the invention has a large real-time processing bandwidth and a large dynamic range.

In one embodiment of managing the use of channelization codes during soft handoff of a mobile station from a transferring network station to a candidate network station, a determination is made as to whether a field associated with an existing channelization code used by the candidate network station is unused and meets timing criteria associated with a corresponding field received by the mobile station from the transferring network station. Based on this determination, a channelization code for use by the candidate network station in communicating with the mobile station is assigned.

A data packet transport arrangement includes a tag-based packet multiplexer and a tag-based packet demultiplexer, that utilizes an identification tag to identify packets to each of the N input channels so as to provide a logical transport channel for each of the N channels through the packet transport arrangement. The data transport arrangement thereby allows aggregating multiple communications channels into a higher bit rate link to increase bandwidth efficiency, without compromising the underlying channelized, guaranteed-bandwidth nature of the individual communication channels.

A system and method for coordinating radio resource usage in an unlicensed frequency band (24) is provided. Specifically, under the present invention, a set of spectrum etiquette rules is provided that govern how radio systems (20A-C) operate within unlicensed frequency bands (24). In a typical embodiment, the set of spectrum etiquette rules can accommodate radio systems (20A-C) operating at varying channel bandwidths. To this extent, the set of spectrum etiquette rules generally includes: a channel switching rule; a bandwidth selection rule; a power selection rule; a deferring listen before talk (LBT) rule; a channelized LBT rule; and a synchronized LBT rule.

Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, are provided with CI to greatly improve performance and reduce transceiver complexity. CI introduces families of orthogonal polyphase codes that can be used for channel coding, spreading, and / or multiple access. Unlike conventional DS-CDMA, CI coding is not necessary for energy spreading because a set of CI carriers has an inherently wide aggregate bandwidth. Instead, CI codes are used for channelization, energy smoothing in the frequency domain, and interference suppression. CI-based ultra-wideband protocols are implemented via frequency-domain processing to reduce synchronization problems, transceiver complexity, and poor multipath performance of conventional ultra-wideband systems. CI allows wideband protocols to be implemented with space-frequency processing and other array-processing techniques to provide either or both diversity combining and sub-space processing. CI also enables spatial processing without antenna arrays. Even the bandwidth efficiency of multicarrier protocols is greatly enhanced with CI. CI-based wavelets avoid time and frequency resolution trade-offs associated with conventional wavelet processing. CI-based Fourier transforms eliminate all multiplications, which greatly simplifies multi-frequency processing. The quantum-wave principles of CI improve all types of baseband and radio processing.

In some variations, the present invention provides a method for forming a chip-scale photonic frequency channelizer or spectrum analyzer. A low-loss waveguide forms a long delay-line in a first level, from which a large number of filter-taps form narrow channel passbands. Multi-dimensional laser-written waveguides feed a slab waveguide coupler located at a stacked, second level. A chip-scale RF-photonic spectrum analyzer provided by this invention has extremely high resolution, such as a passband width of about 30 MHz over a free spectral range of 12 GHz, while occupying a device footprint of only about 10 cm2 area.

Various embodiments described herein are directed to methods and systems for multibeam adaptive antenna architectures for recovering user signals in the coverage area of the antenna in the presence of interference sources. For example, various embodiments may utilize an architecture comprised of an array of antenna feeds, an RF to baseband conversion subsystem, a bank of digital beamformers, a channelization subsystem, a bank of weighted combiners, and a bank of demodulators for the demodulation and detection of user signals. The multiple beamformers introduce nulls in the direction of interference sources based on distinct adaptive algorithms for providing different antenna beam patterns after adaptation. Various other embodiments may utilize architecture for providing the directions of the interference sources or intentional jammers.

A method and apparatus in a UE for detecting active channelization codes including channelization codes used by other UEs, which are different from at least one channelization code assigned to the UE, for transmission / reception to / from a Node B in an assigned time slot in a mobile communication system, where each of time slots of a radio channel frame is identified by a plurality of code channels, each having a unique channelization code. Accordingly, a channelization code set is formed to include a predetermined number of channelization codes to be searched, code channel data corresponding to the channelization codes is detected from a received signal, the code power of the code channel data is measured and compared with a predetermined threshold, and channelization codes having code power values exceeding the threshold are selected as active channelization codes.

The invention relates to a design method of an ultra-wideband single-conversion multi-channel digital receiving module. The ultra-wideband single-conversion multi-channel digital receiving module is composed of an analog receiving module body and a digital processing module body. The analog receiving module body processes 2<n>(n=1, 2, 3...) receiving signals and then synthesizes a radio-frequencysignal through a column-wise synthesizer, the radio-frequency signal passes through a section switch filter and then is subjected to frequency mixing and filtering, and a 6 GHz bandwidth wide frequency range signal and a frequency spectrum are shifted to an intermediate frequency of the range being 1-1.4 GHz. The digital processing module enables the input intermediate frequency signal with the bandwidth of up to 400 MHz to be subjected to AD sampling and analog-to-digital conversion, and the sampled signal is directly sent to an FPGA for signal preprocessing. After multiphase filtering channelization processing and amplitude-phase compensation are carried out, 2n-1 channel intermediate frequency digital signals are generated.

The invention discloses an efficient microwave photon channelization receiving method, and relates to the technical field of microwaves and the technical field of optical communication. The method isas shown in figure 1 in the specification, and a laser, a Mach-Zehnder modulator, a dual-parallel Mach-Zehnder modulator, a dual-polarization Mach-Zehnder modulator, a polarization controller, an erbium-doped fiber optical amplifier, a wavelength division multiplexer, a dual-polarization 90-degree optical coupler, a balance photoelectric detector, an electric 90-degree coupler and an electric band-pass filter are included. A plurality of radio frequency signals are copied through polarized orthogonal radio frequency optical combs, local oscillator optical combs and corresponding radio frequency copies are subjected to frequency mixing, the positions and intervals of the two sets of optical combs and the wavelength division multiplexer are controlled, and channelized receiving of broadbandsignals can be achieved through a mirror image suppression demodulation module. According to the invention, the problems of complex system and serious crosstalk in a photon filter bank scheme are overcome, the technical difficulty that multi-comb lines and large-interval optical combs are difficult to generate in a conventional double-optical-comb scheme is overcome, and the method has potential application value in the fields of investigation, radars and the like.

Methods and apparatus for downlink Physical Hybrid Automatic Repeat-reQuest (HARQ) Indicator Channel (PHICH) mapping and channelization in a communication system. First, a base station assigns uplink (UL) physical resource block (PRB) indices to a set of units of user equipment in a cell. Then, for each user equipment, the base station calculates an index triple (KPHICH,0,KPHICH,1,KPHICH,2) for three repetitions of a PHICH signal to be transmitted to the user equipment, with KPHICH, i being a PHICH index indicating a PHICH resource for transmitting the i-th repetition of the PHICH signal to the user equipment, and i=1, 2, 3. When a data packet is received from a unit of user equipment transmitted via at least one physical resource block (PRB) indicated by the at least one PRB index that is assigned to the user equipment, the base station transmits PHICH signals to the user equipment by using the PHICH resources indicated by the PHICH indices assigned to the user equipment.

The present invention provides in one embodiment channel allocation and polarization techniques for reducing cross sector communications interference in a multiple access wireless communications environment. In one embodiment, channel allocation and / or polarization techniques may be applied in multiple-access wireless communications architectures to provide selective, simultaneous communications with wireless devices using a plurality of transmitters. In some embodiments, a transmitter is coupled to an antenna configured to provide simultaneous communications with wireless devices located in different spatial areas or sectors. In some embodiments, communications between wireless devices within a single sector, between wireless devices in different sectors and between wireless devices and a wired network or wireless backhaul network may be provided.

An optimized signal transmission loading method for FDMA (Frequency Division Multiple Access) digital channelized satellite communication systems, which belongs to the technical field of mobile wireless communication, is characterized in that in order to maximize the communication capacity of a satellite repeater, the power of ground user transmitters is first set as a maximum value, and on the basis, an operating point of the satellite repeater is one-dimensionally searched; for each possible operating point in the search range, a multi-level optimization method is used, the Lagrangian multiplier method is used for iteratively working out a gain parameter for each link, moreover, the gains of the links not meeting the requirement on the signal-to-noise ratio are rectified, and the optimal values of on-satellite channel gain parameters are obtained. The optimal parameters are used for configuring the repeater, so that the working point of an on-satellite high power amplifier is changed, and thereby the purpose of maximizing the overall communication capacity is achieved in the end. The signal transmission optimization method is suitable for broadband multi-channel gain-adjustable satellite repeater systems, particularly satellite repeater systems adopting the digital channelization technology and requiring the adjustability of the uplink transmission power of ground sides.

The invention discloses a large-dynamic ultra-wideband digital instantaneous frequency measurement method. The method adopts a radio frequency division technology and is combined with a channelized digital frequency measurement method, so that the covered frequency band is wide, the interception probability is high, and the high frequency resolution can be kept. The method selects 32 paths of digital channelization, so that the frequency measurement delay is ensured not to exceed 1 microsecond and the frequency measurement precision is within the range of 1 MHz. A radio frequency division module carries out three-stage amplification and equalization on an input 1-18 GHz radio frequency signal firstly, so that the input amplitude dynamic range is compressed through the design, and the dynamic range of the input signal is -45 dBm to 0 dBm, and the dynamic range is compressed to -5 dBm to 0 dBm after multi-stage amplification and equalization; and meanwhile, the deterioration of a signal-to-noise ratio is reduced; and furthermore, the amplitude flatness of 1 to 18 GHz of an ultra-wideband signal is ensured, so that the power of full-band signals sent to a frequency divider is within the normal working range of the frequency divider.

Techniques for transmitting data with space-time scrambling in cellular systems (e.g., CDMA systems) are described. At least one stream of data symbols is generated, mapped to one or more physical channels, and spread with channelization codes for the physical channels. Space-time scrambling is performed on the at least one stream of data symbols to generate at least two streams of output chips. The space-time scrambling may be achieved by performing matrix multiplication with a sequence of matrices. For each time interval in which space-time scrambling is performed, a matrix may be selected (e.g., based on a scrambling code for a base station), and data to be sent in the time interval is multiplied with the selected matrix. The matrices used for space-time scrambling may be defined and selected in various manners. The streams of output chips are processed and transmitted from respective transmit antennas.

The invention discloses a reconnaissance and interference integrated system, and a method comprises the following steps: dividing a received signal into sub-bands through a front-end analog channelization structure, performing down-conversion processing to obtain a baseband signal, mixing the baseband signal with a frequency mixing sequence, and performing summing to obtain a summed signal, so that the data volume is greatly reduced, and the sampling data rate is reduced; enabling the summed signal to be subjected to interference of a specified interference pattern to obtain an interference signal, so that the interference bandwidth is reduced, and the interference can still cover the full frequency band of the reconnaissance signal; mixing the interference signal with the periodic mixingsequence to obtain an interference mixing signal; performing up-conversion processing on the interference mixing signal to obtain an interference modulation signal, so the frequency spectrum of the interference signal is shifted to each sub-band; enabling the interference modulation signal to pass through a filter bank and performing summing to obtain a final interference signal. Compared with a traditional reconnaissance receiver and a jammer, the system can reduce the sampling rate, simplify the transmitting and receiving channel structure and achieve multi-band multi-signal simultaneous interference.

The invention provides a new embedded Rake receiver system with high integrity, which integrates a stochastic sequence code generator, an orthogonal channel code generator, a stochastic sequence descrambler, a orthogonal code-channel separation demodulator, a vector dot product device, and modules for signal power detection, Finger time track, Finger lock indication, channel estimation, dephasing rolling merge, automatic frequency control, estimation for signal-noise rate, automatic receiving gain control, to realize corresponding necessary functions for Rake receiver. This receiver can almost finish all 3G receiver's functions except channel decode, fits well to realize in embedded communication chip by hardware way.