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- Muhammad Nazmul Islam, Ashwin Sampath, Atul Maharshi, Ozge H. Koymen, Narayan B. Mandayam
- 2014 48th Annual Conference on Information…
- 2014

Small cells have been proposed as a vehicle for wireless networks to keep up with surging demand. Small cells come with a significant challenge of providing backhaul to transport data to(from) a gateway node in the core network. Fiber based backhaul offers the high rates needed to meet this requirement, but is costly and time-consuming to deploy, when not… (More)

- Muhammad Nazmul Islam, Narayan B. Mandayam, Sastry Kompella
- 2012 10th International Symposium on Modeling and…
- 2012

In this paper, we investigate joint optimal relay selection and resource allocation under bandwidth exchange (BE) enabled incentivized cooperative forwarding in wireless networks. We consider an autonomous network where N nodes transmit data in the uplink to an access point (AP) / base station (BS). We consider the scenario where each node gets an initial… (More)

- Muhammad Nazmul Islam, Raviraj S. Adve
- IET Communications
- 2011

The authors investigate quantisation and feedback of channel state information in a multiuser (MU) multiple-input multiple-output (MIMO) system. Each user may receive multiple data streams. The authors design minimises the sum mean squared error (SMSE) while accounting for the imperfections in channel state information (CSI) at the transmitter. This study… (More)

- Muhammad Nazmul Islam, Raviraj S. Adve
- 2010 IEEE International Conference on Acoustics…
- 2010

We design an end-to-end linear transceiver in the downlink of a multi-user multiple-input multiple-output (MIMO) system with multiple data streams per user and quantized channel state information at the transmitter. We minimize the sum mean squared error (SMSE) under a sum power constraint with quantization based on the mean squared inner product. We make… (More)

- Muhammad Nazmul Islam, Raviraj S. Adve
- ArXiv
- 2010

We investigate quantization and feedback of channel state information in a multiuser (MU) multiple input multiple output (MIMO) system. Each user may receive multiple data streams. Our design minimizes the sum mean squared error (SMSE) while accounting for the imperfections in channel state information (CSI) at the transmitter. This paper makes three… (More)

Wireless systems are getting deployed in many new environments with different antenna heights, frequency bands and multipath conditions. This has led to an increasing demand for more channel measurements to understand wireless propagation in specific environments and assist deployment engineering. We design and implement a rapid wireless channel sounding… (More)

Non-negative definite Lyapunov functionals are employed to obtain sufficient conditions that guarantee exponential stability of the zero solution of a nonlinear discrete system. The theory is illustrated with several examples.

We design an end-to-end linear transceiver in the downlink of a multi-user (MU) multiple input single output (MISO) system with quantized channel state information at the transmitter (CSIT). The design minimizes the sum mean squared error (SMSE) under a sum power constraint. The contribution of this paper is two-fold. First, unlike previous approaches, we… (More)

- Muhammad Nazmul Islam, JEFFREY T. NEUGEBAUER
- 2008

In this article, the contraction mapping principle and Liapunov’s method are used to study qualitative properties of nonlinear Volterra equations of the form x(t) = a(t)− ∫ t 0 C(t, s)g(s, x(s)) ds, t ≥ 0. In particular, the existence of bounded solutions and solutions with various L properties are studied under suitable conditions on the functions involved… (More)

Liapunov’s method is normally used to study the stability properties of the zero solution of differential and difference equations. Certain difficulties arise when Liapunov’s method is applied to equations with unbounded delay or equations containing unbounded terms [11], [20]. It has been found that some of these difficulties can be eliminated if fixed… (More)