## 1 Introduction  
The limitation of the radio frequency (RF) spectrum can now be overcome by optical wireless communication (OWC) [1]. Specifically, in indoor environments, OWC provides wide unlicensed bandwidths that enable wireless home networking systems to offload their data traffic as an alternative to existing RF systems. In addition, OWC is immune to interference from electromagnetic sources and are secure by design, as light cannot penetrate walls. The availability of light emitting diodes (LEDs) with high luminance resulted in inexpensive and efficient illumination devices [2]. These devices will soon replace the existing fluorescent lamps and light bulbs, paving the way for a new technology known as Light Fidelity (Li-Fi) that utilizes visible light communications (VLC). In VLC, LEDs have a dual functionality of both illumination and data transmission by modulating light intensity at a rate that cannot be detected by human eyes. Due to its perception, VLC is considered secure, power efficient, and does not raise health concerns, making it a very promising technology for high-speed communications. However, commercially available LEDs have a limited modulation capability; hence, the transmission bandwidth of practical VLC systems is restricted. In home and office environments, a typical indoor light fixture should provide illumination levels of about 200-1000 lux, depending on the performed tasks requirements [3]. For general illumination, white colored LEDs are more desirable than single colored (i.e., red, green, yellow, blue, etc.). White light is either emitted by mixing red, green, and blue colored LEDs (i.e., RGB white LEDs) or combining phosphor with a blue LED (i.e., phosphor white LEDs). Phosphor white LEDs are more commonly used because they are easier to implement at lower costs. However, the phosphor coating limits its switching speed to only few MHz. The phosphor-based LED typically consists of a blue LED chip covered by a yellow phosphor layer. However, when this phosphor-based LED is used for the VLC, the modulation bandwidth is limited by the long relaxation time of the phosphor, limiting the transmission capacity of the VLC. White LEDs are usually blue InGaN LEDs with a coating of a suitable material. Cerium(III)-doped YAG (YAG:Ce\({}^{3+}\), or Y\({}_{3}\)Al\({}_{5}\)O\({}_{12}\):Ce\({}^{3+}\)) is often used with a decay constant in the range of tens of nanoseconds [4]. Techniques such as blue-filtering [5] as well as pre-equalization [6; 7] and post-equalization [8] are different techniques reported in the literature to extend both bandwidths and data rates. In Reference [5], even though blue-filtering achieved a significant bit-error-rate (BER) enhancement, the communication distance was limited to just 30 cm. Post-equalization techniques, as in Reference [8], are performed at the receiver's end, which results in noise magnification and limits the communication distance in the cm range. The most recent bandwidth extension by pre/post-equalization circuits was reported by [PERSON] et al. [9], yet the bandwidth was only extended to 304 MHz. Other researchers apply different modulation formats such as orthogonal frequency division multiplexing (OFDM) [10; 11]. However, complex modulation techniques increase the system's architecture complexity. On the other hand, in order to mitigate the limitations of LED-based multiple-input multiple-output (MIMO) VLC systems, previously conducted credible studies were scrutinized to understand their strengths and weaknesses [12; 13; 14; 15]. The contributions of this paper can be divided into two parts. Initially, a new LED array pattern is proposed in an indoor VLC system in order to achieve a more uniform light (i.e., illumination) distribution. The impact of both the receiver and the transmitter angles on the transmission performance of the proposed model is studied and the output is compared with other related distribution patterns in the literature maintaining the same number of LEDs used.