1.
2.
Lundin, Henrik, et al.
(författare)
Analog-to-Digital Converter Error Correction using Frequency Selective Tables
2002
Ingår i: RadioVetenskap och Kommunikation (RVK). ; , s. 487-490
Konferensbidrag (övrigt vetenskapligt/konstnärligt) abstract
Error correction for analog-to-digital converters(ADCs) is considered. The frequency-dependent na-ture of ADC errors motivates the proposal of a novel scheme, incorporating look-up table correction andfast frequency estimation. The method is evaluated using experimental converter data, and the performance, measured in SFDR and SINAD, is found tobe superior to that of non frequency-dependent correction methods.
3.
Larsson, Peter, 1966-
(författare)
Advanced multi-sensor processing
2003
Patent (populärvet., debatt m.m.) abstract
NOVELTY - A superposition of signals received from transmitting nodes (10), at receiving nodes (120) is converted to produce soft complex signal information for transmission over network. The signal information transmitted from a subset of transmitting nodes, is collectively detected based on the soft complex signal information. USE - For detecting signal information in digital cellular network of wideband code division multiple access (WCDMA) system. ADVANTAGE - Reduces amount of information to be transported over the network, thereby improving the performance of the network and improving the uplink signal processing efficiency at low cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) system for detecting signal information in wireless network; (2) network node. DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of the centralized architecture and signal processing approach. transmitting nodes (10) receiving nodes (120-1-120-3)
4.
5.
Larsson, Peter, 1966-, et al.
(författare)
Method and Apparatus in a Mimo Based Communication System
2003
Patent (populärvet., debatt m.m.) abstract
NOVELTY - The communication parameters are adapted for set of user terminals based on principle used for optimizing communication with respect to partial channel state information (CSI) by singular value decomposition (SVD). The parameters for another set of terminals, are adapted based on another principle to optimize multiple input and multiple output (MIMO) communication. The parameters are then sent to respective set of terminals. USE - For communicating between user terminals in multiple input multiple output (MIMO) based communication network (claimed). ADVANTAGE - Optimized communication between the user terminals is obtained effectively. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) transmitter node; and (2) multiple input multiple output based communication network. DESCRIPTION OF DRAWING(S) - The figure shows the schematic diagram of the SVD-based MIMO system. (Drawing includes non-English language text). scheduling unit (9') feedback channels (17,19) preprocessor (91) transmitter (T4)
6.
Larsson, Peter, 1966-
(författare)
Method and architecture for wireless communication networks using cooperative relaying
2003
Patent (populärvet., debatt m.m.) abstract
NOVELTY - The method involves determining specific and common transmission parameters for relay station based on which the signals are forwarded from one link between transmitter (210') and relay station, to another link between relay station and receiver (220'). USE - For communication in two hop wireless communication network. ADVANTAGE - Ensures more precise and reliable characterization of individual radio paths, and optimizes different transmission parameter, so as to fully exploit the network. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) relay station adapted in two hop wireless communication network; (2) system for communication in two hop wireless communication network; (3) receiver; (4) base station; and (5) mobile station. DESCRIPTION OF DRAWING(S) - The figure shows a schematic model used to describe the parameters and terms used in data communication. relay stations (215:1-215:k) transmitter (210') receiver (220')
7.
Larsson, Peter, 1966-
(författare)
Method and system for wireless communication networks using cooperative relaying
2003
Patent (populärvet., debatt m.m.) abstract
NOVELTY - The method involves selecting relay channels (530:1-530:k) associated with the relay stations (415) having spatial overlap coverage at the mobile station, for establishing communication session between the base station and mobile station. USE - For communication such as multiple input-multiple output (MIMO) communication between base station (claimed) and mobile station in two-hop wireless communication network such as radio access network and cellular network. ADVANTAGE - The MIMO communication between the base station and mobile station is optimized using the relay stations without any increase in excessive control signaling over the air interface. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) system for communication in two-hop wireless network; (2) receiver; and (3) base station. DESCRIPTION OF DRAWING(S) - The figure shows a logical block diagram of the wireless communication system. relay station (415) base station transmitter (510) transmit antennas (513) mobile station receiver (520) relay channels (530:1-530:k) transmit channel (535)
8.
9.
Larsson, Peter, 1966-
(författare)
Methods and arrangements in a telecommunications system
2000
Patent (populärvet., debatt m.m.) abstract
NOVELTY - The method involves providing multiple channel estimation in the field of space time coding in a radio communication system. Space time coding includes transmitter diversity, space(-time) multiplexing and other complex use of signal coding in time and space. USE - For wireless communication ADVANTAGE - Pilot signals are sent concurrently instead of consecutively in order to increase bandwidth efficiency during a multitude of channel transfer functions in OFDM and doing so, guaranteeing non-interfering channel estimates at low processing cost for both transmitter and receiver side. Provides channel estimation technique, which is very bandwidth efficient DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a wireless communication system, and an arrangement in a wireless communication system DESCRIPTION OF DRAWING(S) - The figure shows a schematic view illustrating pilot signal being sent concurrently.
10.
Stäring, J., et al.
(författare)
Fluctuations of the Shannon capacity in a Rayleigh model of wireless communication
2004
Ingår i: Physica Status Solidi (B): Basic Research. - : Wiley. - 1521-3951 .- 0370-1972. ; 241:9, s. 2136-2138
Tidskriftsartikel (refereegranskat) abstract
We consider a Rayleigh model[Foschini and Gans, Wirel. Pers. Commun. 6, 311 (1998)] for the Shannon capacity characterising wireless information transfer in a network of antennae. In this model, the capacity C is a linear statistic of the channel matrix of the network. We use this fact to calculate the variance var[C] of the Shannon capacity. We find that the expected value 〈C〉 of the Shannon capacity is typical, that is the coefficient of variation √var[C]/〈C〉 is small.
