Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Takenobu Arima

Kazuyuki Miya

Hiroyuki Uejima

Masayuki Hoshino

Katsuhiko Hiramatsu

Toshiyuki Uehara

Yukari Kobayashi

Tooru Miura

An antenna device includes a ground conductor; a ground conductor extension that is connected to the ground conductor; and an antenna element that is connected to the ground conductor and that operates in both a first frequency band and a second frequency band higher than the first frequency band, the ground conductor and the ground conductor extension having a length that is &#xbc; of a wavelength of a frequency included in a middle range between the first frequency band and the second frequency band and that is not a natural number multiple of &#xbc; of a wavelength of the first frequency band.

Antenna device

A mobile wireless device includes a first microphone that receives an audio signal, a plurality of antennas disposed at different distances from the first microphone, a wireless unit that performs wireless signal processing for signals received/transmitted through the antennas, an antenna switch that is connected to the wireless unit and performs antenna switching to connect one of the plurality of antennas to the wireless unit, an audio signal processor that processes the audio signal, and a main body that is wearable and includes the wireless unit, the first microphone, the antenna switch, the audio signal processor, and at least one of the antennas. The audio signal processor calculates a level of the audio signal. The antenna switch performs the antenna switching based on the level of the audio signal to switch to one of the antennas that is anticipated to provide better performance.

Mobile wireless device

The CM controlleroutputs times at which signals are sent to various communication terminal apparatuses in a compressed mode based on information on the compressed mode sent from a host station such as a control station apparatus to the schedulercoderand modulator. The schedulerdecides times (order) at which packet data is sent to the respective communication terminal apparatuses based on priority information such as channel conditions and times at which signals are sent in the compressed mode and outputs schedule information indicating the times for creating this packet data to the switch circuitThe switch circuitoutputs the packet data to be sent to the communication terminal apparatuses sequentially to the coderaccording to the schedule created by the scheduler

Scheduling creation apparatus, base station apparatus, and radio communication method

A transmission rate determining method that enables assignment of transmission rate (modulation scheme and coding rate) to be optimized with high accuracy in the AMC technique. In the method, in a base station, Doppler frequency detectordetects the Doppler frequency (moving speed) of each mobile station. MCS assignment sectioncorrects a relational expression of MCS (coding rate and modulation scheme) and CIR based on the Doppler frequency (moving speed) obtained in Doppler frequency detector, for example, corrects a threshold in CIR, and determines MCS optimal for CIR report value. Results of assignment in MCS assignment sectionare output to coding sectionand modulation section

Radio communication apparatus and transfer rate decision method

At noise component addition section, a noise equivalent value equivalent in size to noise component is calculated using a constant which is dependent on a difference of spreading factors between a common pilot channel and packet channels, and at correlation matrix and correlation vector calculation section, the noise equivalent value is added to diagonal elements of an autocorrelation matrix. At weight calculation section, an optimal weight is calculated using the autocorrelation matrix whose diagonal elements have been added the noise equivalent value, and at adaptive equalization section, equalization of reception signal is carried out. Thereby, noise enhancement produced in the packet channels after the equalization due to the difference between the spreading factor of the common pilot channel and the spreading factor of the packet channels can be reduced.

Reception device and reception method

The PL signal of a PL portion is multiplied by gain factor &#x3b2;c in a multiplier() and the data of a data portion is multiplied by gain factor &#x3b2;d in a multiplier(). These gain factors &#x3b2;c and &#x3b2;d are controlled in a weight controlling circuit (). The PL signal and data thus multiplied by gain factors are added in an adder () and become an added PL signal. This added PL signal is output to a delay profile generation circuit (). In the delay profile generation circuit (), a delay profile is generated using the added PL signal. The delay profile is output to a path selection circuit () where path search is performed, and the information of selected reception timings are output to a RAKE combining circuit () and a channel estimation circuit (). By this means, iterative path search and channel estimation can be performed with accuracy even when receiving signals where channels of different transmission power ratios are multiplexed.

Radio reception apparatus and radio reception method

Delay profiles of respective branch received signals received through a plurality of antennas are formed; peaks on each of formed delay profile signals are detected; the maximum peaks are obtained among detected peaks on the respective delay profile signals; and average delay differentials between the delay profiles are obtained by averaging a desired number of delay differentials among the maximum peaks.

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Yokosuka, Japan

Takenobu Arima