Nokia Corporation

Nokia Siemens Networks Oy

Nokia Technologies Oy

Marilynn P Green

Shu-Shaw Wang

Tony R Reid

Anthony Reid

Jyrki Lahtonen

Shu-Shaw (Peter) Wang

A communications system includes a source, a destination, and multiple relays. In a first time period, the source emits a first transmission and a first relay retransmits a prior source transmission. Then, in a second, subsequent time period, the source node emits a second transmission and a second relay transmits the source transmission from the first time period. Optionally, the transmission from the second relay also includes the message from the first relay during the first time period. Similarly, in a third time period, the first relay transmits a message that includes the second relay's transmission and the second source transmission from the second time period. Alternatively, the source node transmit in a first frequency band, the first and second relays receive only in the first frequency band, and retransmit in a second frequency band, and the destination receives in both the first and second frequency bands.

Symmetrical cooperative diversity in the relay-enabled wireless systems

Various example embodiments are disclosed herein. According to an example embodiment, an apparatus may include a multiple modulation index continuous phase encoder (CPE) configured to perform continuous phase encoding on one or more received symbols and to output CPE encoded symbols, the CPE being configured to a known initial state prior to receiving a data block of one or more symbols, and a termination symbol (TS) generator coupled to the CPE, the TS generator configured to generate one or more termination symbols to be appended to the received data block, wherein an ending state of the CPE after receiving the one or more termination symbols is the same as the known initial state of the CPE.

Termination techniques for multi-index continuous phase encoders for wireless networks

Various example embodiments are disclosed relating to relay networks or multi-hop networks, and also relating to power control and channel reuse techniques for wireless relay networks. A technique of power control in a wireless relay network may include receiving a channel measurement report via a relay station from a mobile station attached to the relay station, and determining a mobile station-specific downlink data transmission power level for the relay station to transmit data to the mobile station based at least in part on the received channel measurement report from the mobile station.

Power control and channel reuse techniques for wireless relay networks

A signal is generated in the time domain (e.g., GSM, CDMA waveform), digitally sampled at a rate N per symbol interval T over an observation window of length JT to achieve a vector of JN samples. The JN samples are transformed via a DFT of size JN to the frequency domain, where they are mapped using the DFT coefficients to subcarriers of an OFDM or SC-FDMA waveform. Then an IDFT is executed to convert the samples back to the time domain, which are then transmitted on the mapped subcarriers. For the case of a portable device cognitive radio, subcarriers other than the JN subcarriers may be used for pilots or zero weights may be applied to them. For the case of a network node, pilots or samples for other users may be mapped to the other subcarriers, in which case the IDFT is size M&#x3e;JN for transforming all the user signals.

Spectrum sharing between OFDM and non-OFDM radios

A technique is provided to generate a sequence of symbols to be transmitted, comprising transmitting a block of symbols having data and redundancy symbols, the redundancy symbols generated based on the data symbols, a first part of the redundancy symbols transmitted as a prefix of the block, a second part of the redundancy symbols transmitted as a postfix of the block and a third part of the redundancy symbols transmitted as an intermediate part of the block between the prefix part and postfix part. The first part may be generated from the symbols transmitted at the end of a data portion of the block, the second part may be generated from the symbols transmitted at the start of the data portion of the block, the third part may be generated from an entire sequence of non-redundant data symbols transmitted in the first half of the data portion of the block.

Method and apparatus to generate a continuous phase modulation waveform that is symmetric and periodic

This invention relates to a method, a computer program, a computer program product, a transmitter and a receiver for a multicarrier modulation, wherein symbols are assigned to carriers of a set of N carriers, the method comprising assigning at least one of the symbols to a first carrier of the set of N carriers, and assigning an antipodal representative of the at least one of the symbols to a second carrier of the set of N carriers.

Multicarrier modulation with enhanced frequency coding

Various example embodiments are disclosed herein. According to an example embodiment, a method may include receiving a plurality of data symbols, generating a continuous phase modulated waveform based on the data symbols, generating a plurality of coefficients which represent the continuous phase modulated waveform, and wirelessly transmitting the plurality of coefficients via a plurality of subcarriers.

Continuous phase modulation processing for wireless networks

According to one general aspect, a method including receiving noisy data via a communications channel, wherein the noisy data includes a clean data component and a noise component. In various embodiments, the method may also include decoding, utilizing a low-density lattice code (LDLC) matrix, the received noisy data to substantially recover the clean data component. In some embodiments, the LDLC matrix may not include a matrix of less than a length of six cycles. In one embodiment, the LDLC matrix may be algebraically constructed. In various embodiments, the method may include storing the decoded clean data component.

Low density lattice code generator matrices using mutually orthogonal latin squares

A method determines channel state information of a channel of a wireless network. Each of the wireless devices is configured to operate over the wireless network. An allocation of available transmission resources is performed according to a utility-based cross-layer resource management framework that transforms a utility function into an equivalent bipartite graph to concurrently maximize throughput and fairness in the resource allocation.

Cross layer network optimization for OFDMA systems using message passing algorithm

Various example embodiments are disclosed herein. According to an example embodiment, an apparatus for use in a wireless transmitter may include a continuous phase modulation (CPM) sample generator configured to generate a group of constant envelope CPM modulated signal samples, a Fourier transform block configured to perform a Fourier transform on the group of constant envelope signal samples to generate an initial group of Fourier coefficients, a zero insertion block configured to generate an expanded group of Fourier coefficients by inserting one or more zeros in the initial group of Fourier coefficients, and an inverse Fourier transform block configured to perform an inverse Fourier transform on the expanded group of Fourier coefficients to generate a group of constant envelope time-domain samples and to map the constant envelope time-domain samples onto a group of orthogonal subcarriers for transmission.

Techniques to generate constant envelope multicarrier transmission for wireless networks

To reflect advantages of a constant phase modulation waveform, the invention provides a pulse amplitude modulated PAM waveform that is a superposition of Q&#x2266;2PAM component pulses in each symbol interval such that a significant portion of signal energy over each symbol interval is within the QPAM component pulses. The present invention distributes most signal energy in one pulse and progressively lower energies in the remaining Q&#x2212;1 pulses of a symbol interval. The Laurent Decomposition is a special case of the present invention, but the present invention exhibits the energy distribution of the Laurent Decomposition in non-binary CPM waveforms and in multi-h (binary and non-binary) CPM waveforms, where h is a modulating index. All energy is distributed among only Q=2pulses in each symbol interval, though only Q&#x3c;Q pulses may in fact be transmitted in certain embodiments. A method, transmitter, receiver, and computer program are disclosed. Embodiments may exactly duplicate a CPM waveform, or approximate a CPM waveform.

Method and apparatus for generating M-ary CPM waveforms from a superposition of PAM waveforms

The present invention provides a new and unique method and apparatus for providing an estimate of a mobile location of a wireless node, point or terminal in a wireless local area network (WLAN) or other suitable network, the estimate being based on a correlation of a radio frequency (RF) signal strength measurement and a grid point in a signal strength database or radio map. The signal strength database or radio map is built using a signal strength fingerprint algorithm. The signal strength fingerprint algorithm includes selecting and measuring a set of grid points in the wireless local area network (WLAN) or other suitable network.

Mobile location method for WLAN-type systems

Testing apparatus, and an associated method, for testing operation of a mobile terminal. Testing is performed, e.g., to determine compliance of the mobile terminal to E911 Phase II positioning requirements. A network and radio channel emulator emulates network signals generated and communicated to the mobile terminal in an actual operating environment. Positioning measurements made by the mobile terminal are monitored and determinations of the operation of the mobile terminal are made therefrom.

Apparatus, and associated method, for testing a mobile terminal in test conditions that emulate an operating environment

Apparatus, and an associated method, for a radio communication system having a sending station and a receiving station. The sending station sends data pursuant to a communication service and ultrawide band signals pursuant to a selected time-hopping sequence. An ultrawide band signal detector is positioned at the receiving station. The ultrawide band signal detects the ultrawide band signal transmitted thereto. Correlation is made between the detected ultrawide band signal and a locally-generated replica signal. Correlations therebetween are used to facilitate various receiving station operations, such as equalization operations upon received data, time synchronization of the receiving station to the sending station, and position determination of the positioning of the receiving station.

Apparatus, and associated method, for facilitating communications in a radio communication system through use of ultrawide band signals

Apparatus, and an associated method, dynamically selects values of thresholds to be used in a determination of whether to request a handoff of communications between serving and target base stations of a cellular, or other, radio communication system. Because the thresholds are dynamically determined, the thresholds are selectable responsive to communication characteristics about the mobile stations with which communications are to be handed off.

Growing community of inventors

Pomona, NY, United States of America

Marilynn P Green