Abstract: A method for transmitting data streams in a multiple input multiple output (MIMO) system is provided, where each data stream is mapped to multiple layers in an MIMO channel space for transmission, and the method includes: performing inter-layer interleaving for N data streams to obtain N interleaved data streams; mapping the N interleaved data streams respectively to N layers in the MIMO channel space, and transmitting the N interleaved data streams that are mapped to the N layers. By using the method of the present invention, a combined CQI can be used in a better way to improve MIMO transmission performance. Further, an impact of inter-layer interference is canceled by using an interference cancellation technology (for example, an SIC technology) based on the inter-layer interleaving.

Abstract: A method and an apparatus for selecting a transport format are provided. The method includes: receiving a transport format parameter of a user equipment sent by a base station, where the transport format parameter of the user equipment includes a primary stream grant value and an association between the primary stream and the secondary stream; determining a maximum transport block length of the primary stream according to a preset value of the maximum transmit power of the user equipment and the association between the primary stream and the secondary stream; determining an actual transport block length of the primary stream according to a size relationship between a theoretical transport block length of the primary stream and the maximum transport block length; and determining a transport block length of the secondary stream.

Abstract: Embodiments are provided for interference cancellation (IC) capability reporting and user equipment (UE) offloading in wireless or heterogeneous networks. In an embodiment, a method performed by a UE includes reporting, to a network, IC capability information of the UE, and receiving, from the network, instructions in accordance with the IC capability information of the UE. A handover procedure is then initiated in accordance with the instructions. In another embodiment, a method performed by a network component includes receiving, from a UE, IC capability information of the UE, evaluating the IC capability information of the UE, and sending instructions to the UE in accordance with the IC capability information of the UE. The instructions determine a handover behavior by the UE.

Abstract: Embodiments of the present invention provide an interference processing method and device. A user equipment receives a notification message sent by a network side. The notification message includes a resource scheduling manner of a first base station, and the resource scheduling manner is a manner of allocating, by the first base station, resources for downlink service data transmission of a local user equipment. The user equipment detects, according to the resource scheduling manner, an interference signal generated by the first base station and performs interference cancellation processing according to a detection result.

Abstract: A method and a device for determining a smooth window length in channel estimation is provided. The method includes: obtaining autocorrelation values of pilot signals, where the autocorrelation values include first autocorrelation values and second autocorrelation values, at least two first autocorrelation values exist, and at least one second autocorrelation value exists; determining a speed range according to symbols of the first autocorrelation values or the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range. Through the method provided in embodiments of the present invention, the problems caused by a fixed smooth window length may be avoided, and this improves system performance.

Abstract: The present invention discloses a multi-carrier receiving device and method. The multi-carrier receiving device includes an antenna, a splitter, a plurality of analog extraction modules, a combiner, an analog-to-digital converter, and a plurality of digital extraction modules, where input ends of the plurality of analog extraction modules are connected to an output end of the splitter; an input end of the combiner is connected to output ends of the plurality of analog extraction modules, and an output end of the combiner is connected to an input end of the analog-to-digital converter; an output end of the analog-to-digital converter is connected to each of the plurality of digital extraction modules; and the plurality of digital extraction modules extracts a single-carrier digital signal from a digital signal obtained after analog-to-digital conversion.

Abstract: A channel estimating method and device are provided. The method includes: performing multi-path searching on a pilot channel, and performing interpolation on a channel estimation value at a radial position of the multi-path searching (101); performing raised cosine de-convolution on the channel estimation value that undergoes the interpolation (102); acquiring the channel estimation value at each radial position in the pilot channel according to the channel estimation value that undergoes the raised cosine de-convolution and a sample deviation acquired by performing the multi-path searching (103). The channel estimating method and device eliminate the sample deviation of the channel estimation value, improve the demodulation performance, and evidently reduce the operation workload.

Abstract: The present invention discloses a multi-carrier receiving device and method. The multi-carrier receiving device includes an antenna, a splitter, a plurality of analog extraction modules, a combiner, an analog-to-digital converter, and a plurality of digital extraction modules, where input ends of the plurality of analog extraction modules are connected to an output end of the splitter; an input end of the combiner is connected to output ends of the plurality of analog extraction modules, and an output end of the combiner is connected to an input end of the analog-to-digital converter; an output end of the analog-to-digital converter is connected to each of the plurality of digital extraction modules; and the plurality of digital extraction modules extracts a single-carrier digital signal from a digital signal obtained after analog-to-digital conversion.

Abstract: A channel estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system and a corresponding receiving apparatus are provided. The technical solutions use the receiving apparatus to firstly perform channel estimation in time dimension on received signals, obtain channel information of pilot points from an effective sub-carrier frequency band on a frequency domain of each OFDM symbol, obtain information of the pilot points on frequency bands outside the effective sub-carrier frequency band by adding the information of the pilot points, and then perform Inverse Fast Fourier Transform (IFFT), windowing, zero-padding, and Fast Fourier Transform (FFT) to obtain a channel frequency response, so as to obtain a channel estimation result. The technical solutions can achieve goals of restraining an edge effect and improving accuracy of the channel estimation.

Abstract: A signal detecting method and device for a multi-codeword multi-input multi-output (MIMO) system are provided, which are used in the field of communication and solve the problem that it is complex to implement a signal detecting method in the multi-codeword MIMO system and the error between the signal obtained through detection and the signal actually transmitted from the transmitting end is large. The method includes: converting a received complex number signal into a real number signal; performing channel estimation to obtain a channel matrix; correcting the channel matrix to obtain an equivalent corrected matrix; generating an equivalent detecting signal according to the equivalent corrected matrix and the real number signal obtained through conversion; quantizing the equivalent detecting signal to obtain an equivalent quantized detecting signal; and generating a signal transmitted from a transmitting end according to the equivalent quantized detecting signal.

Abstract: A channel estimating method and device are provided. The method includes: performing multi-path searching on a pilot channel, and performing interpolation on a channel estimation value at a radial position of the multi-path searching (101); performing raised cosine de-convolution on the channel estimation value that undergoes the interpolation (102); acquiring the channel estimation value at each radial position in the pilot channel according to the channel estimation value that undergoes the raised cosine de-convolution and a sample deviation acquired by performing the multi-path searching (103). The channel estimating method and device eliminate the sample deviation of the channel estimation value, improve the demodulation performance, and evidently reduce the operation workload.

Abstract: A method and a device for determining a smooth window length in channel estimation is provided. The method includes: obtaining autocorrelation values of pilot signals, where the autocorrelation values include first autocorrelation values and second autocorrelation values, at least two first autocorrelation values exist, and at least one second autocorrelation value exists; determining a speed range according to symbols of the first autocorrelation values or the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range. Through the method provided in embodiments of the present invention, the problems caused by a fixed smooth window length may be avoided, and this improves system performance.

Abstract: A channel estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system and a corresponding receiving apparatus are provided. The technical solutions use the receiving apparatus to firstly perform channel estimation in time dimension on received signals, obtain channel information of pilot points from an effective sub-carrier frequency band on a frequency domain of each OFDM symbol, obtain information of the pilot points on frequency bands outside the effective sub-carrier frequency band by adding the information of the pilot points, and then perform Inverse Fast Fourier Transform (IFFT), windowing, zero-padding, and Fast Fourier Transform (FFT) to obtain a channel frequency response, so as to obtain a channel estimation result. The technical solutions can achieve goals of restraining an edge effect and improving accuracy of the channel estimation.

Abstract: A signal detecting method and device for a multi-codeword multi-input multi-output (MIMO) system are provided, which are used in the field of communication and solve the problem that it is complex to implement a signal detecting method in the multi-codeword MIMO system and the error between the signal obtained through detection and the signal actually transmitted from the transmitting end is large. The method includes: converting a received complex number signal into a real number signal; performing channel estimation to obtain a channel matrix; correcting the channel matrix to obtain an equivalent corrected matrix; generating an equivalent detecting signal according to the equivalent corrected matrix and the real number signal obtained through conversion; quantizing the equivalent detecting signal to obtain an equivalent quantized detecting signal; and generating a signal transmitted from a transmitting end according to the equivalent quantized detecting signal.