New Technology May Double Radio Frequency Data Capacity

A team of Columbia Engineering researchers has invented a technologyâ€"full-duplex radio integrated circuits (ICs)â€"that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same frequency in a wireless radio. Up to now, this has been thought to be impossible: transmitters and receivers either work at different times or at the same time but at different frequencies. The Columbia team, led by Electrical Engineering Associate Professor Harish Krishnaswamy, is the first to demonstrate an IC that can accomplish this. The researchers presented their work at the International Solid-State Circuits Conference (ISSCC) in San Francisco on February 25.

CoSMIC (Columbia high-Speed and Mm-wave IC) Lab full-duplex transceiver IC that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same frequency in a wireless radio

“This is a game-changer,” says Krishnaswamy, director of the Columbia high-Speed and Mm-wave IC (CoSMIC) Lab. “By leveraging our new technology, networks can effectively double the frequency spectrum resources available for devices like smartphones and tablets.”

In the era of Big Data, the current frequency spectrum crisis is one of the biggest challenges researchers are grappling with and it is clear that today's wireless networks will not be able to support tomorrow's data deluge. Today's standards, such as 4G/LTE, already support 40 different frequency bands, and there is no space left at radio frequencies for future expansion. At the same time, the grand challenge of the next-generation 5G network is to increase the data capacity by 1,000 times.

So the ability to have a transmitter and receiver re-use the same frequency has the potential to immediately double the data capacity of today's networks. Krishnaswamy notes that other research groups and startup companies have demonstrated the theoretical feasibility of simultaneous transmission and reception at the same frequency, but no one has yet been able to build tiny nanoscale ICs with this capability.

“Our work is the first to demonstrate an IC that can receive and transmit simultaneously,” he says. “Doing this in an IC is critical if we are to have widespread impact and bring this functionality to handheld devices such as cellular handsets, mobile devices such as tablets for WiFi, and in cellular and WiFi base stations to support full duplex communications.”

The biggest challenge the team faced with full duplex was canceling the transmitter's echo. Imagine that you are trying to listen to someone whisper from far away while at the same time someone else is yelling while standing next to you. If you can cancel the echo of the person yelling, you can hear the other person whispering.

“If everyone could do this, everyone could talk and listen at the same time, and conversations would take half the amount of time and resources as they take right now,” explains Jin Zhou, Krishnaswamy’s PhD student and the paper’s lead author. “Transmitter echo or ‘self-interference’ cancellation has been a fundamental challenge, especially when performed in a tiny nanoscale IC, and we have found a way to solve that challenge.”

Krishnaswamy and Zhou plan next to test a number of full-duplex nodes to understand what the gains are at the network level. “We are working closely with Electrical Engineering Associate Professor Gil Zussman and his PhD student Jelena Marasevic, who are network theory experts here at Columbia Engineering,” Krishnaswamy adds. “It will be very exciting if we are indeed able to deliver the promised performance gains.”

This work was funded by the DARPA RF-FPGA program

Thankyou to columbia.edu for the tireless research, this really is an exciting invention, the possibilities if this can be brought to our industry are unbelievable.

Motorola H5 - Earth's Smallest Bluetooth Headset

Bluetooth is one types of earpiece the most overwhelming technologies that is presently available in almost all cell phones. It assists one to transfer data from device to another as long as these phones are not far from each other. One can only enjoy using Bluetooth facility if he/she looks into the necessary accessories that are required for this case. As a result, one will have to obtain Bluetooth Headset.

However, it is quite alarming to note that those people who are driving expensive cars are the ones who can't seem to understand that they can't use their phone while on the road. They might think that they're above the law or something just because they're rich. However, a simple earpiece with a wire just costs $10 each. Surely, they're not that cheap not to get these phone appendages if they can't buy a communication equipment, right? However, there may be laws against wired earpieces in some areas. Better find out if this option is acceptable from where you live.

The bundles usually have a series of games which can be played by almost everybody. After this you need to check the types of earpiece which is wireless. With the help of this device you can even play the games online.

The Voice radio earpiece control feature work fin too as long as you know the right commands. The accuracy is really great and this app recognizes what you say provided there is no too much noise in the background. And interestingly, if you have contacts with similar names, then it will call all the similar names asking you to be more specific.

Thermos bottle. Don't go on a trip without one. But you're going on a cruise, you say. OK...I don't know about you, however after a few days at sea, I easily tire of having room service deliver my coffee and danish. I don't put out the hang-tag on the doorknob because it never fails that if I request an early coffee, I will have had trouble falling asleep and would rather sleep late. Or vice versa; I wake up early and have to wait til it arrives.

All characters are displayed well on the screen of the handset. The screen is 2.0" long with 262K TFT display. Sony Erickson S312 is designed well in terms of design and technology for the user.

Motorola Earpieces For All Types of Industry

Are you in the security industry? Using Motorola Walkie Talkies? Need the ability to not have your conversation overheard, or need to silent on an event or restaurant service area, yet still in contact with your team? Do you need to walk and talk, so that you can multitask, or get other tasks completed while you are on the phone?

Then Motorola is the company, and the earpiece, for you and your team.



If you are in security, events or hotel management, you wouldn't necessarily want everyone to be able to see that you are wearing an earpiece, and there are a variety of ways to minimise the “I have a radio in my pocket and I boss people around” kind of look.

First clip the charged radio on to your belt. Select the station or frequency that you will be using. Make sure that the team are all on the same station. Attach the Motorola earpiece to the radio, by slotting the two prongs at the bottom of the cable in to the side of the Motorola walkie talkie. You will see there is a big prong and a small prong, make sure you have them the right way round.

Run the length of the earpiece cord under your shirt, and pop the top out by the collar or top button of your shirt, thereby hiding the wire from site. You will see a clip portion with a little speaker button it. That can be clipped on to your tie, shirt front or collar to allow you to speak in to it easily.



The Motorola earpiece is a curved half moon shape. Make sure the wire is tucked securely in to the casing, as it can sometimes come out during storage and insertion. Clip the half moon shape over the ear and insert the round black earpiece in to the ear. The earpiece is covered with a removable soft cover that can be taken off and washed if the radio’s are used by different people, in the interest of best hygiene practises.

If you are going for minimal look, arrange your hair to cover the earpiece or cord if possible. There are also high security options that run up the back of the neck and over the ear, and come in see through, clear tones to minimise the obviousness of them. These can be secured in to place using see through tape made especially for this purpose.

Motorola also makes very hi-tech options for security personnel, with items that can clip on to sunglasses, shirt cuffs etc, and give a very FBI, protecting the president look, but are extremely functional. They ear buds are also more fitting and are snug in the ear, to allow for better audio.

To speak through the microphone portion bring the unit close to your mouth. Press the button in and wait one second before speaking, to allow time for the radio’s to connect. When you are finished speaking, release the button. Wait for your team member to respond to your message. Remember to talk slowly and clearly. Although Motorola radios are really great quality, you are still a distance away from each other, and things such as mobile phones nearby, thick walls or ceilings, being underground etc can interfere with the signal and reception.

If you are a Motorola mobile phone user, then there are also a wide variety of Motorola earpieces available, that won’t make you look like a call centre agent, or hurt the inside of the ear if you wear them for long periods at a time. The Whisper Smooth Talk, comes with a retractable boom with 4-mic CrystalTalk and offers the user cutting edge clarity and wind noise reduction, especially useful if you are calling from outside, or talking while you are walking.

Bluetooth headsets clip over the ear, and allow you to connect wireless to your phone, which can be in your pocket or bag, and allow you to walk along and talk, without any cables or wires hanging around and getting in the way.

Motorola has been innovating in the phone and walkie talkie industry for many years, and the constant innovation and bettering of their Motorola earpieces and products for ease of use and comfort is inspirational.