Abstract: A method and apparatus for allocating channels for a wireless communication local area network are presented. A system includes a console and a plurality of nodes controllable by the console through wireless communication. At least two nodes are connected in series, each of the nodes being configured to transmit signals in turn. A trigger signal is sent to a first node, and a first response signal sent by the first node in response to the trigger signal to determine that the first node is available. A first wireless channel is allocated for wireless communication between the console and the first node, and for sending information including the allocation of the first wireless channel to the first node, whereupon the first node transmits the trigger signal to a second node adjacent to the first node after confirming that the allocation of the first wireless channel has been completed.

Abstract: The present invention proposes a wireless control system and method which may be mainly used in illumination networks. The wireless control system and method of the invention distributes data signals to be transmitted at a control terminal in different time slots of different frequencies for transmission, while each node in the system will only receive its corresponding data signal in a predetermined time slot of a predetermined frequency. Thus a high operating rate can be obtained at the control terminal while maintaining the operating rate of the node unchanged. This helps to greatly reduce the cost of the wireless transceiver of each node, thereby correspondingly reducing the cost of the whole system and realizing a high expansibility.

Abstract: The invention provides a method and apparatus used in a receiver for sampling RF signals, particularly to provide a method and apparatus for greatly decrease the sampling rate performed in RF band. The invention provides an apparatus for sampling a RF signal including a plurality of interference frequency components and a useful frequency component, comprising: a filtering unit for filtering out at least one preset interference frequency component from the RF signal to generate a notch-filtered RF signal; a sampling unit for sampling the notch-filtered RF signal at a preset sampling rate to generate a discrete analog signal. The sampling unit can be implemented by a plurality of notch filters. RF sampling can be simply and conveniently implemented by using the method and apparatus according the invention, and the sampling rate can be decreased to about 1/N of the carrier frequency of the useful frequency component, which is much lower than the sampling rate in existing RF sampling scheme.

Abstract: The present invention provides a low intermediate frequency receiver for receiving radio frequency signal and provides the sampling method thereof. The low intermediate frequency receiver firstly samples the radio frequency signal so as to convert it into digital signal of non-zero frequency domain. Secondly it compensates the digital signal of non-zero frequency domain to filter out the interfering signal therein. Finally, the compensated digital signal is frequency-shifted to the zero frequency domain. By using the low intermediate frequency receiver and the sampling method thereof according to the present invention, the interference at the zero frequency, like DC drift and intermodulation component, could be easily filtered out without imposing any great influence on the useful signals.

Abstract: The present invention discloses a method of allocating channels for a wireless communication local area network, with a system comprising a console and a plurality of nodes that can be controlled by the console through wireless communication, which method comprises the steps of connecting at least two nodes in series via a connecting means, each of the nodes being configured to transmit signals in turn through said connecting means; sending a trigger signal to a first node through said connecting means; receiving a first response signal sent by the first node in response to said trigger signal so as to determine that the first node is available; allocating a first wireless channel for wireless communication between the console and the first node, and sending information including the allocation of the first wireless channel to the first node; whereupon the first node transmits the trigger signal to a second node adjacent to the first node after confirming that the allocation of the first wireless channel has

Abstract: The present invention proposes a wireless control system and method which may be mainly used in illumination networks. The wireless control system and method of the invention distributes data signals to be transmitted at a control terminal in different time slots of different frequencies for transmission, while each node in the system will only receive its corresponding data signal in a predetermined time slot of a predetermined frequency. Thus a high operating rate can be obtained at the control terminal while maintaining the operating rate of the node unchanged. This helps to greatly reduce the cost of the wireless transceiver of each node, thereby correspondingly reducing the cost of the whole system and realizing a high expansibility.

Abstract: This invention provides an improved digital luminance controlling system, which can control the luminous intensity of an illuminating apparatus by choosing the number of the ignited luminaries. It optimizes the number of the ignited luminaries according to the different contribution rate of each luminary to the general luminous intensity to reduce the power consumption. By properly adjusting the sampling frequency of the luminous intensity of the circumstance, this invention could decrease the operating frequency of the luminance controlling system, thereby to further reduce the power consumption. This invention also provides a analog type of the luminance controlling system, which consists of a optical sensing apparatus, a analog type of the luminance controlling apparatus and a set of optical source and can realize a real time luminance adjustment, to reduce the power consumption.

Abstract: The invention relates to an RF signal sampling apparatus for a wireless receiver, comprising a first transconductor circuit (Gmi), for converting received RF voltage signals into current signals, a first HR filter, for down-sampling and filtering the current signals, and an FIR filter, for further filtering, down-sampling and outputting the signals which are outputted by the first HR filter.

Abstract: The present invention provides a quadrature-sampling clock signals generation method and apparatus for use in a receiver The apparatus firstly obtains an initial clock signal whose frequency is lower than twice of the carrier frequency of an input signal, then divides the frequency of the initial clock signal by two to obtain two quadrature intermediate clock signals, and finally divides the frequency of the two intermediate clock signals respectively to output two quadrature sampling clock signals. With the clock signal generation method and apparatus of the present invention, it is possible to operate a VCO at a relative low frequency, which will not only reduce the cost of the VCO, but also decrease the power consumption thereof.

Abstract: The invention provides a method and apparatus used in a receiver for sampling RF signals, particularly to provide a method and apparatus for greatly decrease the sampling rate performed in RF band. The invention provides an apparatus for sampling a RF signal including a plurality of interference frequency components and a useful frequency component, comprising: a filtering unit for filtering out at least one preset interference frequency component from the RF signal to generate a notch-filtered RF signal; a sampling unit for sampling the notch-filtered RF signal at a preset sampling rate to generate a discrete analog signal. The sampling unit can be implemented by a plurality of notch filters. RF sampling can be simply and conveniently implemented by using the method and apparatus according the invention, and the sampling rate can be decreased to about 1/N of the carrier frequency of the useful frequency component, which is much lower than the sampling rate in existing RF sampling scheme.

Abstract: An RF filtering and amplifying apparatus is proposed, comprising: a plurality of RF filters, connected with each other in a manner of cascade, for filtering the received radio signal level by level; a LNA (low noise amplifier), for amplifying the filtered signal to output an amplified and filtered signal. The RF filtering and amplifying apparatus in the present invention can not only meet the requirement for the selectivity of the filters, but also achieve desirable in-band distortion and insertion loss meanwhile.

Abstract: The present invention provides a low intermediate frequency receiver for receiving radio frequency signal and provides the sampling method thereof. The low intermediate frequency receiver firstly samples the radio frequency signal so as to convert it into digital signal of non-zero frequency domain. Secondly it compensates the digital signal of non-zero frequency domain to filter out the interfering signal therein. Finally, the compensated digital signal is frequency-shifted to the zero frequency domain. By using the low intermediate frequency receiver and the sampling method thereof according to the present invention, the interference at the zero frequency, like DC drift and intermodulation component, could be easily filtered out without imposing any great influence on the useful signals.

Abstract: A bandpass sampling receiver is proposed for receiving RF signals, comprising: the first ADC, for converting the RF signal into the first path of digital signal under the control of the first sampling clock signal; the second ADC, for converting the RF signal into the second path of digital signal under the control of the second sampling clock signal; a signal separating unit, for separating the in-phase signal and the quadrature signal in the first path of digital signal and the second path of digital signal; wherein the frequency of said first sampling clock signal and said second sampling clock signal is l/N of that of said RF signal, and N is a natural number.

Abstract: A bandpass-sampling receiver is proposed, comprising: the first Sigma-delta ADC, for converting the received RF signal into the first channel of digital signal under the control of the first sampling clock signal; the second Sigma-delta ADC, for converting the received RF signal into the second channel of digital signal under the control of the second sampling clock signal; a signal separating unit, for separating the in-phase signal and the quadrature signal in the first channel of digital signal and the second channel of digital signal. Low-resolution Sigma-delta ADC is adopted to sample and quantize the analog RF signal, thus the bandpass sampling receiver can save cost of ADCs.

Abstract: This invention provides an improved digital luminance controlling system, chich can control the luminous intensity of an illuminating apparatus by choosing the number of the ignited luminaries. It optimizes the number of the ignited luminaries according to the different contribution rate of each luminary to the general luminous intensity to reduce the power consumption. By properly adjusting the sampling frequency of the luminous intensity of the circumstance, this invention could decrease the operating frequency of the luminance controlling system, thereby to further reduce the power consumption. This invention also provides a analog type of the luminance controlling system, which consists of a optical sensing apparatus, a analog type of the luminance controlling apparatus and a set of optical source and can realize a real time luminance adjustment, to reduce the power consumption.

Abstract: A mobile terminal in wireless communication systems, comprising a control unit, for generating control information according to the bands and modes corresponding to signals to be received and signals to be transmitted; a band switching unit, for switching to the propagation path of the corresponding band to transfer corresponding signals, according to the control information; a mode switching unit, for switching to the propagation path of the corresponding mode to transmit signals in the propagation paths of the corresponding band and the corresponding mode, according to the control information; an RF processing unit, for RF processing the signals transferred from the propagation path of the corresponding mode in corresponding band, RF processing the signals to be transferred in corresponding band and then transferring them to the propagation path of the corresponding mode; a base-band processing unit, for converting RF signals from the RF processing unit into base-band signals, and transferring the base-band

Abstract: The present invention provides a low cost receiver by reducing the required dynamic range of the ADC in a wireless communication receiver, without degrading the receiver performance. In the wireless communication receiver of the invention, a digital filter is used to filter digital signals from the ADC to attenuate residual interferers in the digital signals by a predetermined amount (e.g., more than that prescribed in a technical specification). This allows relaxation of tolerable quantization noise generated by the ADC to a pre-defined level to thereby substantially reduce a dynamic range of the ADC. This pre-defined level of quantization noise is higher than a level prescribed by the receiver's sensitivity, while the total interference of the receiver is kept at a level not greater than an allowable level. Thus, the ADC has a word length that corresponds to the reduced dynamic range.