Patent application number | Description | Published |
20090046771 | RECEPTION QUALITY ESTIMATING APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND RECEPTION QUALITY ESTIMATING METHOD - A reception quality estimating apparatus, a wireless communication system and a reception quality estimating method wherein the communication qualities in a case where different communication schemes are used to have communication can be artificially estimated without switching the communication schemes to be used for the communication. A wireless communication apparatus ( | 02-19-2009 |
20090103516 | SYNCHRONIZATION DETECTING CIRCUIT AND MULTIMODE WIRELESS COMMUNICATION APPARATUS - Multimode wireless communication apparatus supports plural wireless communication methods and includes synchronization detecting part. Digital signals output from first A/D part and second A/D part are combined by synchronization detecting part. Synchronization detecting part converts sampling frequencies of respective digital signals and performs other processes when combining digital signals. Synchronization detecting part detects synchronization timing for plural wireless communication methods by plurally performing correlation operation corresponding to respective wireless communication methods for digital signals combined, thereby providing a multimode wireless communication apparatus with its size and power consumption reduced. | 04-23-2009 |
20090116594 | RADIO RECEIVER - A radio receiver including a reception processing system that uses a discrete-time frequency conversion to acquire a signal having a sampling rate corresponding to a local frequency, wherein the reception characteristic is improved when the reception processing system is applied to a system having a wide reception channel band. The radio receiver ( | 05-07-2009 |
20090135760 | MULTIMODE WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A multimode wireless communication apparatus that supports plural wireless communication systems and switches wireless communication systems to communicate. The apparatus includes a signal processor capable of switching wireless communication systems by plural manners; and a controller that directs to the signal processor a combination of manners of switching wireless communication systems according to a communication environment. The signal processor switches wireless communication systems according to the combination of manners of switching wireless communication systems directed from the controller. | 05-28-2009 |
20090150470 | FAST FOURIER TRANSFORMATION CIRCUIT - Provided is a fast Fourier transformation circuit capable of optimizing an operation resource while matching a plurality of communication systems. In this circuit, an FFT circuit ( | 06-11-2009 |
20090187615 | DIGITAL FILTER - Provided is a digital filter for radio communication processing capable of dynamically modifying the characteristic and simultaneously processing a plurality of systems. In the digital filter, calculation core groups ( | 07-23-2009 |
20100201424 | SAMPLING FILTER APPARATUS - The sampling filter apparatus | 08-12-2010 |
20100260242 | TIME DIGITAL CONVERTER, DIGITAL PLL FREQUENCY SYNTHESIZER, TRANSCEIVER, AND RECEIVER - A variable delay circuit ( | 10-14-2010 |
20110013736 | SAMPLING FILTER DEVICE - A sampling filter device wherein the filter characteristic is variable without using a control signal of a complicated waveform is provided. A sampling filter device | 01-20-2011 |
20120076051 | WIRELESS TERMINAL AND COMMUNICATION SYSTEM SWITCHING METHOD - A wireless terminal involving small redundancy that can be reconfigured to a configuration compatible with a plurality of systems using the hardware resources compatible with one system is provided. A wireless terminal | 03-29-2012 |
20120086504 | NONLINEAR DISTORTION COMPENSATING RECEIVER AND NONLINEAR DISTORTION COMPENSATION METHOD - Disclosed are a nonlinear distortion compensating receiver and nonlinear distortion compensation method, wherein nonlinear distortion is reduced with a simple circuit configuration. A correction (opposite characteristics) filter ( | 04-12-2012 |
20130315343 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, TRANSMISSION METHOD, AND RECEPTION METHOD - In a communication system in which propagation path error tolerance is improved by switching the modulation method or error correction method adaptively according to the state of the propagation path, signals MX, MY, CX, and CY indicating the modulation method and error correction method used by the transmitting side are transmitted arranged at discrete locations within the same frame. By this means, the possibility of discretely arranged signals MX and MY, or CX and CY, both degrading is made low even if the transmit signal experiences fading or propagation path fluctuations. As a result, it is possible for the modulation method information signal and/or error correction method information signal to be restored correctly on the receiving side. | 11-28-2013 |