公开(公告)号：WO2006121723A2

公开(公告)日：2006-11-16

申请号：PCT/US2006/016949

申请日：2006-05-03

Applicant: HARRIS CORPORATION

Inventor： ABASCAL, Carlos, Garcia ,  MATTSSON, Anders, S.

IPC: G06F1/02

CPC classification number: G06F1/0356 ,  H04B1/00

Abstract: An RF broadcasting system is presented that employs sinusoidal wave generation with look-up tables. The system includes a base band signal generator that converts a received N bit digital base band signal into an N bit digital address based on the base band signal. A signal processor is included having a plurality of addressable look-up tables that provide sinusoidal wave generating data, each of the tables receiving the address and providing therefrom multi-bit wave generating data. The processor also includes multipliers and summer means all configured and arranged to perform the algorithm: Cos[a + b] = Cos[a] • Cos[b] - Sin[a] ~ Sin[b] or the algorithm: Sin [a + b] = Cos[b] • Sin[a] + Cos [a] • Sin[b] for use in the generation .

Abstract translation: 提出了一种采用具有查找表的正弦波生成的RF广播系统。 该系统包括基带信号发生器，其基于基带信号将接收到的N位数字基带信号转换成N位数字地址。 包括具有提供正弦波生成数据的多个可寻址查找表的信号处理器，每个表接收地址并从其提供多位波生成数据。 处理器还包括全部配置和布置以执行算法的乘法器和加法器：Cos [a + b] = Cos [a] Cos [b] - Sin [a]〜Sin [b]或算法：Sin [a + b] = Cos [b] Sin [a] + Cos [a] Sin [b]用于一代。

公开(公告)号：WO2005002071A1

公开(公告)日：2005-01-06

申请号：PCT/US2004/013791

申请日：2004-05-03

Applicant: HARRIS CORPORATION

Inventor： DUELLO, Wayne, Douglas ,  LUU, Ky, Thoai ,  ABASCAL, Carlos ,  MATTSSON, Anders, S.

IPC: H04B1/02

CPC classification number: H03F1/3282 ,  H03F1/3241 ,  H04B1/0475

Abstract: A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated carrier signal which may exhibit distortions caused by the amplitude modulating of the RF carrier signal. A digitally adaptive corrector precorrects the amplitude varying signal prior to application thereof to the network to compensate for any modulated carrier signal distortions. This includes a digital processor that provides signal correction as a function of digital samples representing amplitude variations of the modulated RF carrier signal.

Abstract translation: 一种用于广播发射机的电路，用于自适应地补偿由RF载波信号的幅度调制引起的载波信号失真。 该电路包括调制器/放大器网络，其接收RF载波信号并通过接收到的幅度变化信号进行调制，从而获得可能表现出由RF载波信号的幅度调制引起的失真的调制载波信号。 数字自适应校正器在施加到网络之前对幅度变化信号进行预校正，以补偿任何调制的载波信号失真。 这包括数字处理器，其提供作为表示调制的RF载波信号的幅度变化的数字样本的函数的信号校正。

公开(公告)号：WO2005002106A1

公开(公告)日：2005-01-06

申请号：PCT/US2004/013602

申请日：2004-05-03

Applicant: HARRIS CORPORATION

Inventor： MATTSSON, Anders, S. ,  ABASCAL, Carlos ,  DUELLO, Wayne, Douglas ,  LUU, Ky, Thoai

IPC: H04K1/02

CPC classification number: H03F1/3247 ,  H03F2201/3209

Abstract: A system and method are provided for providing nonlinear precorrection to an input signal. A plurality of nonlinear function blocks (32) each receive a constituent signal, derived from the input signal. Each constituent signal has an associated value and an associated delay (34). The nonlinear function blocks output an intermediate signal having a value equal to that of an associated memoryless nonlinear function evaluated at the value of the constituent signal. A summation function (36) sums the plurality of intermediate signals to obtain a system output.

Abstract translation: 提供了一种用于向输入信号提供非线性预校正的系统和方法。 多个非线性功能块（32）各自接收从输入信号导出的构成信号。 每个组成信号具有相关联的值和相关的延迟（34）。 非线性功能块输出具有等于在组成信号的值处估计的相关联的无记忆非线性函数的值的中间信号。 求和函数（36）对多个中间信号进行求和以获得系统输出。

公开(公告)号：WO2004062092A1

公开(公告)日：2004-07-22

申请号：PCT/US2003/040527

申请日：2003-12-19

Applicant: HARRIS CORPORATION

Inventor： MATTSSON, Anders, S. ,  ABASCAL, Carlos ,  DUELLO, Wayne ,  DANIELSSONS, Dave

IPC: H03F1/26

CPC classification number: H03F1/3241 ,  H03F1/3247 ,  H03F1/3258

Abstract: A method and apparatus are disclosed for predistorting an input signal to a non-linear amplifier. An appropriate precorrection is determined for the input signal over a series of iterative stages according to an amplifier model. The amplifier model includes a limiting function that clips the input signal to reduce error due to amplifier saturation. The determined precorrection is then applied to the input signal.

Abstract translation: 公开了用于将输入信号预失真至非线性放大器的方法和装置。 根据放大器模型，通过一系列迭代阶段为输入信号确定适当的预校正。 放大器模型包括一个限幅功能，可以剪辑输入信号，以减少由放大器饱和引起的误差。 然后将确定的预校正应用于输入信号。