Low-Power Time Deinterleaver for ISDB-T Receiver

A time deinterleaver structure for Terrestrial Integrated Services Digital Broadcasting (ISDB-T) is presented to reduce power consumption in synchronous dynamic random-access memory (SDRAM). ISDB-T exploits long time interleaving, which requires many long delay buffers at the deinterleaving of the receiver. The conventional single-pointer structure reduces the number of the pointer registers, but it shows inefficiency with SDRAM. The proposed structure allocates the delay buffers appropriately for reducing the number of SDRAM accesses and row activations and, as a result, the SDRAM power consumption. Experimental result shows that SDRAM power consumption is reduced by 24%.