Abstract: The present invention provides a MIMO transmission method for discrete modulated signals. The method is mainly characterized in maximizing the mutual information of symbol vectors of a transmitter and a receiver by joint optimization of a source distribution and a precoding matrix. When the current precoding matrix G is determined, the distribution of source multi-dimensional vectors x is maximized by a Lagrange multiplier method to maximize a source entropy; and when the distribution of the current source multi-dimensional vectors x is determined, the precoding matrix G is optimized by a gradient descent method to maximize the mutual information of the transmitted and received vectors. The transmission rate approximates the Shannon limit under a MIMO scenario by joint optimization of the source distribution and the precoding matrix. After the transmitter determines a marginal distribution of symbols of each channel, a non-uniform modulation is performed by using a probabilistic amplitude shaping technology.

Abstract: The present invention provides a MIMO transmission method for discrete modulated signals. The method is mainly characterized in maximizing the mutual information of symbol vectors of a transmitter and a receiver by joint optimization of a source distribution and a precoding matrix. When the current precoding matrix G is determined, the distribution of source multi-dimensional vectors x is maximized by a Lagrange multiplier method to maximize a source entropy; and when the distribution of the current source multi-dimensional vectors x is determined, the precoding matrix G is optimized by a gradient descent method to maximize the mutual information of the transmitted and received vectors. The transmission rate approximates the Shannon limit under a MIMO scenario by joint optimization of the source distribution and the precoding matrix.

Abstract: An optical touch module and an optical touch display panel are provided. The optical touch module includes a first photo sensor, a second photo sensor, and a signal processing unit. The first photo sensor is disposed in one of the plurality of pixels of a pixel array. A first terminal and a control terminal of the first photo sensor are coupled to a first scan line. The second photo sensor has a first terminal coupled to a second terminal of the first photo sensor and outputting a sensing voltage, a control terminal coupled to the first terminal of the second photo sensor, and a second terminal receiving a first voltage. The signal processing unit is coupled to the first terminal of the second photo sensor, so as to convert the sensing voltage to a touch signal.

Abstract: An optical touch module and an optical touch display panel are provided. The optical touch module includes a first photo sensor, a second photo sensor, and a signal processing unit. The first photo sensor is disposed in one of the plurality of pixels of a pixel array. A first terminal and a control terminal of the first photo sensor are coupled to a first scan line. The second photo sensor has a first terminal coupled to a second terminal of the first photo sensor and outputting a sensing voltage, a control terminal coupled to the first terminal of the second photo sensor, and a second terminal receiving a first voltage. The signal processing unit is coupled to the first terminal of the second photo sensor, so as to convert the sensing voltage to a touch signal.

Abstract: This is a projecting board combined the function of being a white board and developer, this invention use acrylic resin, polyester, epoxy resin combined to be a bake lacquer by mixed with dayglo, hardener and silver powder, extinction powder . . . etc materials to complete this invention that can be spread on hard or soft boards by rolling or spray after baking, it also can be wrote on the surface by erasable marker and clean it properly, the effect of the light diffusion on the surface do not cause the light faint while projecting, it do not be affected by irradiation while turn on the light indoor or sunlight downpour, the developing effect on the surface can advance the function of projection, to raise the definition, brightness and contrast of projecting reflection, to use the single baking lacquer spray can reach the great value developing effect of writing on the surface, do not need to use multi-layers to save the producing cost.

Abstract: A storage system for improving efficiency in accessing flash memory and method for the same are disclosed. The present invention provides a cache unit for temporarily storing data prior to writing in the flash memory or reading from the flash memory. In reading process, after data stored in a flash memory is accessed by a host, the cache unit holds the data. Upon subsequent read requests to read the same data, the data is cached accordingly, thereby shortening a preparation time for reading the data from the flash memory. In writing process, a host requests write a series of requests to write data into the flash memory, the data is gathered and is stored in the cache unit until the cache unit is full. A cluster of data in the cache unit is accordingly written into the flash memory, so that a preparation time for writing the data into the flash memory is also shortened.

Abstract: A switched capacitor (SC) network is used in conjunction with a single PN junction to form a switching bandgap reference voltage circuit. The circuit includes an amplifier having an inverting input, a noninverting input, and an output; a first capacitor having a first capacitance (C.sub.1) coupled between the amplifier inverting input and a first common voltage source; a second capacitor having a second capacitance (C.sub.2) coupled between the amplifier inverting input and the amplifier output; a transistor having a base, a collector, and an emitter, the base and collector being coupled to the first common voltage source, and the emitter being coupled to the amplifier noninverting input. Two current sources are coupled to the transistor to bias the transistor to a one level during a precharge mode and a second, higher level during a reference voltage mode. A switch is connected in parallel with the second capacitor.

Abstract: A quasi-passive switched capacitor (SC) delay line includes a predetermined number (N) of passive SC delay stages and an amplifier. Each delay stage includes a first transistor having a control terminal for receiving a clock phase, an input terminal for receiving an input signal, and an output terminal, a second transistor having a control terminal for receiving a different clock phase, an input terminal connected to the output terminal of the first switching device, and an output terminal coupled to the amplifier input, and a capacitor coupled between the output terminal of the first transistor and a common supply voltage. The control terminal of each first transistor receives a unique clock phase and the control terminal of the second transistor of the same stage being receives a different clock phase wherein the clock phase received by the second transistor is delayed by two clock cycles from the clock phase received by the first transistor.

Abstract: An oversampling D/A converter system achieves high linearity and low quantization error by using dual internal D/A converters: one with high linearity but high quantization error and the other with low linearity but low quantization error. A signal path in the system includes an L-bit quantizer for quantizing a digital input signal into an L-bit signal plus a quantization error and a D/A converter for converting the L-bit signal and quantization error into an analog signal. A correction path that parallels the signal path includes an M-bit quantizer, where M is greater than L, and an M-bit D/A converter. A signal generated by the correction path cancels the shaped quantization error of the signal generated by the signal path by adding the negative of the shaped quantization error to the signal of the signal path. The resulting analog signal is filtered by a low-pass analog filter to extract the analog equivalent of the digital input signal.