公开(公告)号：US09529567B2

公开(公告)日：2016-12-27

申请号：US13701397

申请日：2012-10-26

Applicant: Intel Corporation

Inventor： Kameran Azadet ,  Albert Molina ,  Joseph H. Othmer ,  Parakalan Venkataraghavan ,  Meng-Lin Yu ,  Joseph Williams

IPC: G06F9/30 ,  G06F5/01 ,  H04B1/04 ,  H04L1/00 ,  H04L27/233 ,  H04B1/62 ,  H04L25/02 ,  H04L25/03 ,  H03M3/00 ,  H03F1/02 ,  H03F1/32 ,  H03F3/189 ,  H03F3/24 ,  H04B1/00

CPC classification number: G06F9/3001 ,  G06F5/01 ,  G06F9/30036 ,  G06F17/15 ,  H03F1/0288 ,  H03F1/3241 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/336 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H03H17/06 ,  H03M3/30 ,  H04B1/0003 ,  H04B1/0475 ,  H04B1/62 ,  H04B2001/0408 ,  H04L1/0054 ,  H04L25/02 ,  H04L25/03 ,  H04L25/03178 ,  H04L25/03216 ,  H04L25/4917 ,  H04L27/2334

Abstract: A digital processor is provided having an instruction set with a complex exponential function. The digital processor evaluates a complex exponential function for an input value, x, by obtaining a complex exponential software instruction having the input value, x, as an input; and in response to the complex exponential software instruction: invoking at least one complex exponential functional unit that implements complex exponential software instructions to apply the complex exponential function to the input value, x; and generating an output corresponding to the complex exponential of the input value, x. A complex exponential function for an input value, x, can be evaluated by wrapping the input value to maintain a given range; computing a coarse approximation angle using a look-up table; scaling the coarse approximation angle to obtain an angle from 0 to θ; and computing a fine corrective value using a polynomial approximation.

Abstract translation: 提供了具有具有复指数函数的指令集的数字处理器。 数字处理器通过获得具有输入值x的复数指数软件指令作为输入来评估输入值x的复指数函数; 并且响应于复杂的指数软件指令：调用至少一个复数指数函数单元，其执行复指数软件指令以将复指数函数应用于输入值x; 并产生与输入值x的复指数相对应的输出。 输入值x的复数指数函数可以通过包装输入值来保持给定范围来评估; 使用查找表计算粗近似角度; 缩放粗近似角度以获得从0到θ的角度; 以及使用多项式近似计算精细校正值。

公开(公告)号：US09612794B2

公开(公告)日：2017-04-04

申请号：US13661355

申请日：2012-10-26

Applicant: Intel Corporation

Inventor： Kameran Azadet ,  Joseph H. Othmer ,  Meng-Lin Yu

IPC: H04B1/04 ,  H04L1/00 ,  H04B1/62 ,  H04L25/02 ,  H03F1/32 ,  H04B1/00 ,  G06F5/01 ,  H04L27/233 ,  G06F9/30 ,  H04L25/03 ,  H03M3/00 ,  H03F1/02 ,  H03F3/189 ,  H03F3/24

CPC classification number: G06F9/3001 ,  G06F5/01 ,  G06F9/30036 ,  G06F17/15 ,  H03F1/0288 ,  H03F1/3241 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/336 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H03H17/06 ,  H03M3/30 ,  H04B1/0003 ,  H04B1/0475 ,  H04B1/62 ,  H04B2001/0408 ,  H04L1/0054 ,  H04L25/02 ,  H04L25/03 ,  H04L25/03178 ,  H04L25/03216 ,  H04L25/4917 ,  H04L27/2334

Abstract: Software implementations are provided for performing IQ imbalance correction and/or RF equalization. An input signal, x, is processed in software by executing a vector convolution instruction to apply the input signal, x, to a first complex FIR filter that performs one or more of RF equalization and IQ imbalance correction; and executing a vector convolution instruction to apply a conjugate x* of the input signal, x, to a second complex FIR filter that performs the one or more of RF equalization and IQ imbalance correction, wherein the second complex FIR filter is in parallel with the first complex FIR filter. The first and second complex FIR filters have complex coefficients and the input signal comprises a complex signal.

公开(公告)号：US09778902B2

公开(公告)日：2017-10-03

申请号：US13701374

申请日：2012-10-26

Applicant: Intel Corporation

Inventor： Kameran Azadet ,  Chengzhou Li ,  Albert Molina ,  Joseph H. Othmer ,  Steven C. Pinault ,  Meng-Lin Yu ,  Joseph Williams ,  Ramon Sanchez Perez ,  Jian-Guo Chen

IPC: G06F5/01 ,  G06F17/15 ,  G06F9/30 ,  H03H17/06 ,  H04B1/04 ,  H04L1/00 ,  H04L27/233 ,  H04B1/62 ,  H04L25/02 ,  H04L25/03 ,  H03M3/00 ,  H03F1/02 ,  H03F1/32 ,  H03F3/189 ,  H03F3/24 ,  H04L25/49 ,  H04B1/00

CPC classification number: G06F9/3001 ,  G06F5/01 ,  G06F9/30036 ,  G06F17/15 ,  H03F1/0288 ,  H03F1/3241 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/336 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H03H17/06 ,  H03M3/30 ,  H04B1/0003 ,  H04B1/0475 ,  H04B1/62 ,  H04B2001/0408 ,  H04L1/0054 ,  H04L25/02 ,  H04L25/03 ,  H04L25/03178 ,  H04L25/03216 ,  H04L25/4917 ,  H04L27/2334

Abstract: Software Digital Front End (SoftDFE) signal processing techniques are provided. One or more digital front end (DFE) functions are performed on a signal in software by executing one or more specialized instructions on a processor to perform the one or more digital front end (DFE) functions on the signal, wherein the processor has an instruction set comprised of one or more of linear and non-linear instructions. A block of samples comprised of a plurality of data samples is optionally formed and the digital front end (DFE) functions are performed on the block of samples. The specialized instructions can include a vector convolution function, a complex exponential function, an xk function, a vector compare instruction, a vector max( ) instruction, a vector multiplication instruction, a vector addition instruction, a vector sqrt( ) instruction, a vector 1/x instruction, and a user-defined non-linear instruction.