Abstract:
The invention relates to a device for cancelling inter-symbol interference in a sampled digital signal. The device comprises a first filter, for which the optimum transfer function is identical to that of the transmission channel, and which receives a sequence of samples ({{tilde over (d)}n}nεN) representative of the digital signal sent to the input of the transmission channel, a subtractor circuit to subtract the first filter output ({{tilde over (d)}′n}nεN) from the sequence of input samples ({rn}nεN), a second filter tuned to the transmission channel, with an optimum transfer function H*(f), to which the output ({en}nεN) from the subtractor circuit is input, and an adder circuit designed to add the output from the second filter to the sequence of samples ({{tilde over (d)}n}nεN) representative of the digital signal sent to the input of the transmission channel, and thus generating a sequence of complex symbols ({n}nεN) without any inter-symbol interference.
Abstract translation:本发明涉及一种用于消除采样数字信号中符号间干扰的装置。 该装置包括第一滤波器,其中最佳传递函数与传输信道的最佳传递函数相同,并且其接收样本序列({d N n N n} 代表发送到传输信道的输入端的数字信号;减法器电路,用于从输入序列中减去第一滤波器输出({d'N N} N P 调整到传输信道的第二滤波器,具有最佳传递函数H *(f),其中输出({e(x,y)) 输入来自减法器电路的第二滤波器的输出和加法器电路,该加法器电路将来自第二滤波器的输出相加于采样序列({d N n(N n) 代表发送到传输信道的输入的数字信号的代表,并且因此产生复数符号序列({ SUB> 符号干扰。
Abstract:
The invention relates to a reception method for communication over frequency-selective channels with a plurality of send antennas and a plurality of receive antennas, to process data received by the receive antennas that, on sending, was successively modulated and spread. To this end, reception uses: first linear filtering (202, 202′); first interference subtraction (201) that uses an estimate of previously regenerated multi-antenna interference (MAI) and intersymbol interference (ISI); second linear filtering (205, 205′); second interference subtraction (204) that uses an estimate of previously regenerated multi-user interference (MUI); processing to generate an MAI+ISI interference estimate and an MUI interference estimate for the received data from the data filtered in this way. The invention relates further to a reception system adapted to implement the method and a transmission system including the reception system.
Abstract:
A method for converting a voice signal from a source speaker into a converted voice signal with acoustic characteristics similar to those of a target speaker includes the steps of determining (1) at least one function for transforming source speaker acoustic characteristics into acoustic characteristics similar to those of the target speaker using target and source speaker voice samples; and transforming acoustic characteristics of the source speaker voice signal to be converted by applying the transformation function(s). The method is characterized in that the transformation (2) includes the step (44) of applying only a predetermined portion of at least one transformation function to said signal to be converted.
Abstract:
A wireless mobile computing device is provided for receiving and transmitting data. A wireless interface is configured to capture product parameters. The parameters function to at least identify the product with respect to a repository of information operably linked to the mobile computing device. A transceiving unit is configured to provide the captured product parameters to the repository of information, and, to provide location parameters of the mobile computing device to a market locator system. In return, the transceiving unit receives product information from the repository of information which corresponds to the product parameters. The product information also corresponds to a location of the mobile computing device identified by the market locator system. A user interface is configured to provide targeted product information to the user.
Abstract:
The invention relates to a method of modeling reference data in an information system (IS), characterized in that it is based on a Unified Modeling Language (UML) model of reference data for the IS listed in deposits of application data for the IS. Any reference data in the IS is defined by a specialized concept inheriting the characteristics of a generic concept. The method comprises steps in which the following actions are carried out: grouping the concepts into categories according to logical criteria; building a categories diagram in which the categories are grouped according to a predefined typing of categories, wherein the categories are related to each other by UML dependence relations, each materialized in one reference data; making groups of generic concepts in the same category consistent with deposits of application data in the IS by applying the principle according to which reference data defined by specialized concepts inheriting generic concepts in a same category and possessing an identical specialization necessarily belong to the data deposit of a unique application; and defining a direction for UML dependence relations relating the said categories to each other, the said direction of UML dependence relations depending firstly on typing of categories, and secondly on the deposit of the reference data containing the relation.
Abstract:
The invention relates to compression coding and/or decoding of digital signals, in particular by vector variable-rate quantisation defining a variable resolution. For this purpose an impulsion dictionary comprises: for a given dimension, increasing resolution dictionaries imbricated into each other and, for a given dimension, a union of: a totality (D′i ) of code-vectors produced, by inserting elements taken in a final set (A) into smaller dimension code-vectors according to a final set of predetermined insertion rules (F1) and a second totality of code-vectors (Y′) which are not obtainable by insertion into the smaller dimension code vectors according to said set of the insertion rules.
Abstract:
A communications system is arranged to provide a service to user equipment in accordance with mobility management information. The system comprises a session protocol server (S-CSCF) operable to control the state of a communications session for at least one user equipment in accordance with user profile data, a subscriber information database (HSS) for providing the user profile data for the session protocol server (S-CSCF), and a mobility server. The mobility server comprises a mobility manager operable to receive mobile dependent evaluation reports providing an indication of a current state for communicating with the user equipment and to form the mobility management information based on the evaluation reports. The mobility server includes an application programmer's interface operable to communicate call control signalling data between the mobility manager and the session protocol server (S-CSCF). The mobility manager is operable to notify the application program providing the service to the user equipment of the mobility management information in response to a subscription for the information from the application program, the subscription being provided via the session protocol server (S-CSCF) using the call control signalling data. By integrating the mobility server within the system, mobility management information provided by the mobility server can be integrated with other services provided by the system. As such, mobile users deploying application programs within the system, which subscribe to the mobility server, can benefit from added value provided by established system components and re-using established interfaces.
Abstract:
A customer premises device is provided for monitoring quality of service (QOS) metrics between a network edge and a customer. The device includes a memory which stores at least one user profile, and, information regarding active sessions of traffic flow through the customer premises device. A hardware and/or software/firmware based controller monitors traffic flow between the customer and the network edge and receives requests for new active sessions. The processor accesses the at least one user profile stored in memory to identify a policy hierarchy with respect to active sessions of traffic flow upon receipt of a request to establish a new active session. The processor selects a candidate active session to be terminated based upon the policy hierarchy and terminates the selected session in accordance with information stored in memory regarding the selected session. In this manner, the processor enforces quality of service, for both upstream and downstream sessions, based upon the policy hierarchy of the user profile.
Abstract:
The invention relates to a method of marking a datagram that is forwarded over an IP communications network by routers, which method comprises references in the fields of the datagram. When a datagram is received by a router, the router reads a reference entered in the datagram and looks up said reference in a reference table stored in the router. If the reference is not contained in the reference table, the router selects a new reference from the table. The references can correspond to routes between the router and a datagram receiver terminal. The selection of a route reference can take account of a load value assigned to said route.
Abstract:
A cable packaging and unwinding device. The device enables the exact length of cable necessary for connecting two connection points to be unwound easily and quickly and a residual surplus length of cable to be stowed in a protected area, to prevent the cable from being subjected to any twisting or crushing and to obtain a reliable connection between the two connection points.