Appendix introduction

The Appendix is organized as follows: In Appendix A, we state the symbols and notation used in this paper. In Appendix B, we provide the proofs and related lemmas of Theorem 1. In Appendix C, we provide the proofs of Theorem 2. In Appendix D, we provide the proofs and related lemmas of Theorem 3. In Appendix F, we discuss several limitations of this work. Finally, in Appendix G, we discuss the societal impact of this paper. In the paper, vectors are indicated with bold small letters, matrices with bold capital letters.