Engineers recently devised a completely new method for transmission and reception of radio signals with a single chip. This innovation has immense potential to alter the manner in which wireless communication takes place. Separation of receiving and sending bands is quite a complicated task and the job gets tougher as the number of bands take a rise in the recent devices, this takes care of every element included in the wireless technology. Thelist includes Wi-Fi, Bluetooth, GPS, and so forth, every single band needs a filter to bar the stronger transit signals from taking a toll on reception.
An associate professor of computer and electrical engineering, Alyosha Molnar. Ad a professor of ECE from Cornell University, Alyssa Apsel came up with a brilliant solution when separation of signals is concerned. The basic idea behind this concept rests in the transmitter which is, in reality, a cluster of six sub transmitters arranged in a series, all these sub transmissions are connected with an artificial transmission line. Every single sub transmitter sends across signals at fixed intervals, individual outputs from these are then programmed to combine all and generate a radio frequency signal moving in a forward direction, towards the antenna port, that cancels out the reception port.
The ability to program individual outputs permits a simultaneous summation as well as cancellation tuning across large range of frequencies and to alter the signal strength at antenna. Apsel says, “In one direction, it’s a filter and you basically get this cancellation. And in the other direction, it’s an amplifier.” Molnar also explains, “You put the antenna at one end and the amplified signal goes out the antenna, and you put the receiver at the other end and that’s where the nulling happens. Your receiver sees the antenna through this wire, the transmission line, but it doesn’t see the transmit signal because it’s canceling itself out at that end.”
This work has been constructed from a research report that was framed almost six years back by a group of researchers working at the Stanford University. The research came up with a new way for transmitters that allowed those to filter their own transmission, this permitted the weaker incoming signal to be heard by the receiver. It is the very same theory that works with the noise cancelling headphones
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