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diff --git a/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f64.c b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f64.c
new file mode 100755
index 0000000..493df89
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+++ b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_mult_cmplx_f64.c
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+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_cmplx_mult_cmplx_f64.c
+ * Description:  Floating-point complex-by-complex multiplication
+ *
+ * $Date:        13 September 2021
+ * $Revision:    V1.10.0
+ *
+ * Target Processor: Cortex-M and Cortex-A cores
+ * -------------------------------------------------------------------- */
+
+/*
+ * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "arm_compiler_specific.h"
+
+
+#include "dsp/complex_math_functions.h"
+
+/**
+  @ingroup groupCmplxMath
+ */
+
+/**
+  @addtogroup CmplxByCmplxMult
+  @{
+ */
+
+/**
+  @brief         Floating-point complex-by-complex multiplication.
+  @param[in]     pSrcA       points to first input vector
+  @param[in]     pSrcB       points to second input vector
+  @param[out]    pDst        points to output vector
+  @param[in]     numSamples  number of samples in each vector
+ */
+
+ARM_DSP_ATTRIBUTE void arm_cmplx_mult_cmplx_f64(
+  const float64_t * pSrcA,
+  const float64_t * pSrcB,
+        float64_t * pDst,
+        uint32_t numSamples)
+{
+  uint32_t blkCnt;                               /* Loop counter */
+  float64_t a, b, c, d;  /* Temporary variables to store real and imaginary values */
+
+  /* Initialize blkCnt with number of samples */
+  blkCnt = numSamples;
+
+  while (blkCnt > 0U)
+  {
+    /* C[2 * i    ] = A[2 * i] * B[2 * i    ] - A[2 * i + 1] * B[2 * i + 1]. */
+    /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i    ]. */
+
+    a = *pSrcA++;
+    b = *pSrcA++;
+    c = *pSrcB++;
+    d = *pSrcB++;
+
+    /* store result in destination buffer. */
+    *pDst++ = (a * c) - (b * d);
+    *pDst++ = (a * d) + (b * c);
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+}
+
+/**
+  @} end of CmplxByCmplxMult group
+ */