Abstract: An ultrasonic imaging system and an ultrasonic imaging method are provided. The ultrasonic imaging system includes a transmitting beamformer, a receiving beamformer, transducer elements and a controller unit. In a transmitting process, the controller circuit controls the transmitting beamformer to transmit ultrasonic sound signals. In a receiving process, echo signals are received at the transducer elements, the controller unit applies a common fine delay set to the echo signals by controlling a common fine delay beamformer of the receiving beamformer, the delayed echo signals are summed to generate first summation signals, the controller unit further applies compensated coarse delay sets to the first summation signals by controlling coarse delay beamformers of the receiving beamformer, and the delayed first summation signals are summed to generate output beam signals.

Abstract: The ultrasonic system of the present invention uses a microwave beamforming architecture, which can disassemble the multi-channel delay circuit into two circuits of fine delay and coarse delay. Through multi-stage input signal delay and summation, the signal at the probe end can be effectively reduced. The amount of data and hardware complexity meets the needs of system miniaturization. Moreover, the present invention only uses a single microwave beamformer to realize the fine delay calculation of beamforming, and cooperates with the multi-line coarse delay beamforming operation to meet the requirements of multi-line imaging; the setting values of fine delay and coarse delay are also compensated and correction to maintain the accuracy required for multi-line beam focusing on the delay time of each channel.

Abstract: An ultrasound imaging method includes steps of transmitting a plurality of ultrasound signals by a pulse repetition interval; receiving a plurality of reflected signals of the ultrasound signals; separating a blood flow signal and a clutter signal from the reflected signals by a neural network; calculating a blood flow parameter according to the blood flow signal; determining a blood vessel position according to the blood flow parameter; and adjusting an image signal corresponding to the reflected signals according to the blood flow parameter and the blood vessel position to generate an ultrasound image.

Abstract: An ultrasound scanning method includes the steps of emitting N sets of ultrasound signals onto a target from N different angles and receiving the N sets of ultrasound signals reflected and/or scattered by the target; converting the N sets of ultrasound signals into N ultrasound input images; performing a binarization algorithm for the N ultrasound input images to obtain N binarized images; performing a comparison process on the N binarized images to determine whether a noise exists in at least one of the N binarized images; when the noise exists in an i-th binarized image of the N binarized images, removing the noise from an i-th ultrasound input image corresponding to the i-th binarized image; and compounding the N ultrasound input images into an ultrasound output image.

Abstract: An ultrasound scanning method includes the steps of emitting N sets of ultrasound signals onto a target from N different angles and receiving the N sets of ultrasound signals reflected and/or scattered by the target; converting the N sets of ultrasound signals into N ultrasound input images; performing a binarization algorithm for the N ultrasound input images to obtain N binarized images; performing a comparison process on the N binarized images to determine whether a noise exists in at least one of the N binarized images; when the noise exists in an i-th binarized image of the N binarized images, removing the noise from an i-th ultrasound input image corresponding to the i-th binarized image; and compounding the N ultrasound input images into an ultrasound output image.

Abstract: The present invention provides a communication system, signal pre-processing apparatus and signal receiving apparatus thereof. The signal pre-processing apparatus is used for pre-processing signals before they are transmitted by a plurality of antennas. The apparatus includes a serial-to-parallel converter, L compensation processors and L beam formation processors. First of all, the serial-to-parallel converter converts a digital signal into N divided signals. Each of the compensation processors pre-compensates the N divided signals and outputs a compensated signal. Each of the beam formation processors intensifies the compensated signal and outputs an intensified signal. Each of the antennas combines L intensified signals into a particular signal, and meanwhile, upconverts the particular signal into a RF (radio-frequency) signal for transmission.

Abstract: A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one from the received signal. Moreover, the present invention is to take the output of the pre-stage as the input of the present stage with the recursion method so that we can use only one operating circuit to obtain the function the MAI eliminating.

Abstract: A method for data transmission rate adaptation for Wideband Code Division Multiple Access (WCDMA). The method includes A) providing a plurality of parameters, including: a maximum allowable transmission power, a minimum allowable transmission power, an increasing parameter and a decreasing parameter; B) receiving a signal; C) collecting a power excess parameter and a power deficient parameter in accordance to a transmission power control command controlling the signal's transmission power; D) determining whether the power deficient parameter is larger than the increasing parameter or not? If yes, increase the throughput, and then goes to step G, otherwise, goes to step E; E) determining whether the power excess parameter is larger than the decreasing parameter or not? If yes, reduce the throughput, and then goes to step G, otherwise, goes to step F; F) maintaining the throughput, goes to step G; G) end.

Abstract: A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one from the received signal. Moreover, the present invention is to take the output of the pre-stage as the input of the present stage with the recursion method so that we can use only one operating circuit to obtain the function the MAI eliminating.

Abstract: The present invention relates to a method for data transmission rate adaptation, more particularly, to a rate adaptation method for Wideband Code Division Multiple Access (WCDMA), including the following steps: A: Providing a plurality of parameters, including: a maximum allowable transmission power, a minimum allowable transmission power, an increasing parameter and a decreasing parameter; B: Receiving a signal; C: Collecting a power excess parameter and a power deficient parameter in accordance to a transmission power control command controlling the signal's transmission power; D: Determining whether the power deficient parameter is larger than the increasing parameter or not? If yes, increase the throughput, and then goes to step G, otherwise, goes to step E; E: Determining whether the power excess parameter is larger than the decreasing parameter or not? If yes, reduce the throughput, and then goes to step G, otherwise, goes to step F; F: Maintaining the throughput, goes to step G; G: End.

Abstract: The present invention provides a communication system, signal pre-processing apparatus and signal receiving apparatus thereof. The signal pre-processing apparatus is used for pre-processing signals before they are transmitted by a plurality of antennas. The apparatus includes a serial-to-parallel converter, L compensation processors and L beam formation processors. First of all, the serial-to-parallel converter converts a digital signal into N divided signals. Each of the compensation processors pre-compensates the N divided signals and outputs a compensated signal. Each of the beam formation processors intensifies the compensated signal and outputs an intensified signal. Each of the antennas combines L intensified signals into a particular signal, and meanwhile, upconverts the particular signal into a RF (radio-frequency) signal for transmission.

Abstract: A Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA) transceiver in which correlator banks consisting of an array of dual-code correlators (two tri-code correlators) are used to form correlator filters, such as chip matched filters or multi-code RAKE receivers, or FIR filters for CDMA/TDMA related applications.

Abstract: A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.

Abstract: A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.

Abstract: A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.

Abstract: A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.

Abstract: Correlators categorize different combinations of code sequences and identify locations for which code elements for the code sequences are equivalent. Then, a dispreading operation is performed once for each equivalent combination. The equivalent combinations, for example, may be locations where the code elements are the same or locations where code elements are complements of one another.