TY - JOUR T1 - Heisenberg's Inequality and Logarithmic Heisenberg's Inequality for Ambiguity Function JO - Journal of Partial Differential Equations VL - 3 SP - 207 EP - 216 PY - 2000 DA - 2000/08 SN - 13 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/jpde/5507.html KW - Heisenberg's inequality KW - ambiguity function KW - logarithmic Heisenberg's inequality KW - entropy AB - In this article we discuss the relation between Heisenberg's inequality and logarithmic Heisenberg's (entropy) inequality for ambiguity function. After building up a Heisenberg's inequality, we obtain a connection of variance with entropy by variational method. Using classical Taylor's expansion, we prove that the equality in Heisenberg's inequality holds if and only if the entropy of 2k - 1 order is equal to (2k - 1}!.