An integrated circuit created from a cell library of compact cells. Such MTJs may be used in various applications including magnetic memory devices and magnetic recording heads. One matched filter correlates odd-numbered chips of the CDM signal with odd-numbered chips of the spreading code. Further, while the mesh AP is a child mesh AP to the first parent mesh AP, has a secure layer-2 link to the first parent mesh AP, and has a secure tunnel to the Controller, caching session information on the secure tunnel, and using the cached information to re establish the secure tunnel with the Controller, the secure tunnel now via the new mesh AP.