宽带柔性转发器作为下一代卫星通信有效载荷，采用星上数字信道化处理，可以很好地解决传统有效载荷存在的问题，实现卫星信号任意频段、任意带宽之间的灵活交换。针对宽带卫星通信系统，提出了一种任意长度完全重构线性相位余弦调制滤波器组的设计实现方法。首先将原型滤波器的设计转化为一个带二次约束的最小二乘（ QCLS）优化问题，然后利用拉格朗日乘数法，通过迭代来解决这一优化问题。设计实例表明，该方法对于任意长度完全重构线性相位余弦调制滤波器组的设计是有效的。%The digital channelization processing on-board is adopted by the broadband flexible transponder ,which is re-garded the next generation communication satellite payload .It can flexibly transpond signals at any frequency band and with-in any bandwidth ,which can not be well solved by the traditional payloads .This paper proposed a method for designing arbi-trary-length linear-phase cosine-modulated filter banks for broadband satellite communications .The design of the prototype filter for such filter banks was formulated as a quadratic constrained least squares optimization problem .The optimization problem was solved by an iterative Lagrange multiplier approach .An example is presented to demonstrate the effectiveness of the proposed algorithm .
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