Method and system to deliever direct-to-everything terrestrial broadcast services in lower ultra high frequency band

Abstract

Present disclosure provides method and system for a hybrid network system combining High Power High Tower (HPHT) and Low Power Low Tower (LPLT) transmitters to provide enhanced terrestrial broadcast services Operating in Single Frequency Network (SFN) mode, the hybrid network delivers robust coverage for both indoor and outdoor mobile devices. The hybrid network uses advanced signal processing techniques, such as time and frequency interleaving, to improve signal robustness. The hybrid network dynamically adjusts transmission parameters based on real-time conditions, optimizing performance. The hybrid network integrates HPHT and LPLT transmitters which ensure extensive coverage, efficient spectrum utilization, and reduced operational costs. The hybrid network also supports a broad range of devices and adheres to contemporary broadcast standards, promoting environmental sustainability and scalability.

Description

“METHOD AND SYSTEM TO DELIEVER DIRECT-TO-EVERYTHING TERRESTRIAL BROADCAST SERVICES IN LOWER ULTRA HIGH FREQUENCY BAND”TECHNICAL FIELD

[0001] The present invention generally relates to the field of terrestrial broadcast communication systems. More particularly, the present disclosure relates to providing method and system for delivering robust Direct-to-Everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band.BACKGROUND

[0002] The following description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] Traditional terrestrial broadcast systems work by transmitting audio and video signals via radio waves from ground-based transmitters to receiving antennas. The process may start at a broadcast station, where signals are generated, modulated onto specific frequency bands and amplified. These signals may then be sent to transmission towers, which radiate them over a defined coverage area. In the existing scenario, the terrestrial broadcast services rely on High Power High Tower (HPHT) transmitters and large rooftop antennas. The HPHT networks have traditionally been employed to cover large geographical areas using a single high-power transmitter. However, this approach struggles with indoor signal penetration, impractically high transmit power to reach small form factor devices within buildings. Studies indicate that while the HPHT networks provide extensive coverage, they fail to offer reliable portable and mobile coverage in urban areas.

[0004] To address these limitations, there has been a growing interest in cellularized Low Power Low Tower (LPLT) transmissions. Cellularized broadcast networks compatible to Third Generation Partnership Project (3GPP) standards were tried, but these networks face compatibility issues with HPHT transmitters due to low guard intervals in the Orthogonal Frequency Division Multiplexing (OFDM) waveform andlack of support for necessary techniques like time and frequency interleaving. These features are crucial for deep indoor reception and high mobility, making 3G compliant broadcast LPLT networks insufficient for comprehensive broadcast services.

[0005] Further, existing terrestrial broadcast networks have traditionally used the upper UHF frequency band (e.g. ~700MHz and above), thus allowing diversity reception (which requires two receiving antennas) in small form factor mobile devices. This may, however, be difficult to implement in the lower UHF frequency bands. The existing solution for these challenges i.e., existing mobile receivers suitable for consuming video traffic (e.g. from Over The Top ( OTT) sources) usually in the form of smartphones with broadband cellular connectivity (e.g., 4G or 5G), are expensive and may also require costly data tariff plans, which are unaffordable to a large section of consumers.

[0006] There is therefore a need to overcome the challenges associated with the existing technologies and provide robust techniques for providing method and system for delivering robust Direct-to-Everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band.SUMMARY

[0007] The present disclosure overcomes one or more shortcomings of the prior art and provides additional advantages. Embodiments and aspects of the disclosure described in detail herein are considered a part of the claimed disclosure.

[0008] In one embodiment of the present disclosure, a method for delivering Direct-to- everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band has been disclosed. The method comprising configuring a hybrid network for transmitting a broadcast signal, wherein the hybrid network comprises a plurality of High Power High Tower (HPHT) transmitters and a plurality of Low Power Low Tower (LPLT) transmitters. The method further comprises operating the hybrid network in a Single Frequency Network (SFN) mode to facilitate both the plurality of HPHT transmitters and the plurality of LPLT transmitters in broadcasting a same signal on a same frequency and synchronizing transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters using timing information.Further, the method discloses processing broadcast content at a centralized broadcast system and then distributing, from the centralised broadcast system, an encoded broadcast content to the plurality of HPHT transmitters and the plurality of LPLT transmitters. Furthermore, the method recites broadcasting, by the plurality of HPHT transmitters and the plurality of LPLT transmitters, the encoded broadcast content in the lower UHF band and dynamically adjusting a plurality of transmission parameters based on real-time network conditions for delivering the D2X terrestrial broadcast services in the lower UHF band.

[0009] In yet another embodiment of the present disclosure, for dynamically adjusting the plurality of transmission parameters, the method comprises modifying at least one of: guard intervals, timing offsets, power levels, and modulation schemes.

[0010] In yet another embodiment of the present disclosure, for processing the broadcast content, the method further comprises formatting the broadcast content and then transcoding the formatted broadcast content. The method then recited performing a rate matching on the transcoded broadcast content and determining a plurality of modulation and coding schemes (MODCOD) based on the real-time network conditions. Furthermore, the method recites selecting a MODCOD scheme out of the plurality of MODCOD schemes based on at least one of: signal appropriation condition, receiver capabilities and network congestion, subsequently, the method comprises encoding the rate -matched broadcast content according to the selected MODCOD scheme by adjusting a coding rate to balance error correction capability and transmission efficiency. Lastly, the method recites dynamically adapting the selected MODCOD scheme in response to the real-time network conditions.

[0011] In yet another embodiment of the present disclosure, the real-time network conditions comprise at least one of: network channel conditions, location of the plurality of HPHT transmitters and location of the plurality of LPLT transmitters.

[0012] In yet another embodiment of the present disclosure, for synchronizing the transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters, the method further comprises using timestamps embedded into the transmissions.

[0013] In yet another embodiment of the present disclosure, the method further comprises modifying the plurality of HPHT transmitters and the plurality of LPLT transmitters to utilize time and frequency interleaving for signal robustness.

[0014] In yet another embodiment of the present disclosure, wherein for processing the broadcast signal, the method further comprises converting the broadcast signal from the frequency domain to the time domain using inverse Fast Fourier Transform (iFFT).

[0015] In yet another embodiment of the present disclosure, the method recites that the plurality of HPHT transmitters operate over Rician fading channels and the plurality of LPLT transmitters operate over Rayleigh fading channels.

[0016] In yet another embodiment of the present disclosure, the method recites that the plurality of LPLT transmitters use sectorized antenna configurations.

[0017] In yet another embodiment of the present disclosure, wherein for operating the hybrid network, the method further comprises deploying different antenna polarization schemes based on the real-time network conditions.

[0018] In yet another embodiment of the present disclosure, wherein for configuring the hybrid network, the method further comprises integrating the hybrid network with an existing cellular infrastructure.

[0019] In yet another embodiment of the present disclosure, a system to deliver Direct-to- everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band has been disclosed. The system comprises a plurality of High Power High Tower (HPHT) transmitters, a plurality of Low Power Low Tower (LPLT) transmitters, a processor in communication with the plurality of HPHT transmitters and the plurality of LPLT transmitters and a memory in conjunction with the processor. The processor, in turn, is configured to configure a hybrid network for transmitting a broadcast signal, wherein the hybrid network comprises the plurality of HPHT transmitters and the plurality of LPLT transmitters and operate the hybrid network in a Single Frequency Network (SFN) mode to facilitate both the plurality of HPHT transmitters and the plurality of LPLT transmitters in broadcasting a same signal on a same frequency. The processor is further configured to synchronize transmissions across the plurality ofHPHT transmitters and the plurality of LPLT transmitters using timing information. Furthermore, the processor is configured to process broadcast content at a centralized broadcast system and then distribute, from the centralised broadcast system, an encoded broadcast content to the plurality of HPHT transmitters and the plurality of LPLT transmitters. Subsequently, the processor is configured to broadcast, by the plurality of HPHT transmitters and the plurality of LPLT transmitters, the encoded broadcast content in the lower UHF band and then dynamically adjust a plurality of transmission parameters based on real-time network conditions for delivering the D2X terrestrial broadcast services in the lower UHF band.

[0020] In yet another embodiment of the present disclosure, wherein to dynamically adjust the plurality of transmission parameters, the processor is further configured to modify at least one of: guard intervals, timing offsets, power levels, and modulation schemes.

[0021] In yet another embodiment of the present disclosure, to process the broadcast content, the processor is further configured to format the broadcast content and then transcode the formatted broadcast content. The processor is further configured to perform a rate matching on the transcoded broadcast content and then determine a plurality of modulation and coding schemes (MODCOD) based on the real-time network conditions. Furthermore, the processor is configured to select a MODCOD scheme out of the plurality of MODCOD schemes based on at least one of: signal appropriation condition, receiver capabilities and network congestion and then encode the rate-matched broadcast content according to the selected MODCOD scheme by adjusting a coding rate to balance error correction capability and transmission efficiency. Lastly, the processor is configured to dynamically adapt the selected MODCOD scheme in response to the real-time network conditions.

[0022] In yet another embodiment of the present disclosure, the processor is further configured to synchronize transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters using timestamps embedded into the transmissions.

[0023] In yet another embodiment of the present disclosure, the processor is further configured to modify the plurality of HPHT transmitters and the plurality of LPLT transmitters to utilize time and frequency interleaving for signal robustness.

[0024] In yet another embodiment of the present disclosure, to process the broadcast signal, the processor is further configured to convert the broadcast signal from the frequency domain to the time domain using inverse Fast Fourier Transform (iFFT).

[0025] In yet another embodiment of the present disclosure, wherein to operate the hybrid network, the processor is further configured to deploy different antenna polarization schemes based on the real-time network conditions.

[0026] In yet another embodiment of the present disclosure, to configure the hybrid network, the processor is further configured to integrate the hybrid network with an existing cellular infrastructure.

[0027] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.BRIEF DESCRIPTION OF DRAWINGS

[0028] The features, nature, and advantages of the present disclosure will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout. Some embodiments of system and / or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and with reference to the accompanying Figs., in which:

[0029] Fig. 1A depicts an exemplary scenario illustrating the deployment of the HPHT transmitters for the terrestrial broadcast services in accordance with embodiments of the present disclosure;

[0030] Fig. IB depicts an exemplary hybrid network illustrating the deployment of a both LPLT and HPHT transmitters for providing D2X terrestrial broadcast services, in accordance with embodiments of the present disclosure;

[0031] Fig. 2 depicts a block diagram illustrating the system for delivering the D2X terrestrial broadcast services, in accordance with embodiments of the present disclosure;

[0032] Fig. 3 depicts a block diagram illustrating the use of time and frequency interleaving, in the hybrid terrestrial broadcast network, for robust reception of broadcast signals, in accordance with embodiments of the present disclosure;

[0033] Fig. 4 illustrates the impact of different polarization schemes on the effectiveness of the signal propagation in the terrestrial broadcast system, in accordance with embodiments of the present disclosure;

[0034] FIG. 5 illustrates the challenges that arise due to overlapping of signals in the SFN mode when the plurality of LPLT transmitters is deployed within the D2X terrestrial broadcast system, in accordance with the embodiment of the present disclosure; and

[0035] FIG. 6 illustrates the impact of timing offsets on the reception of signals in the SFN mode in accordance with the embodiment of the present disclosure.

[0036] Fig. 7 is a flowchart showing steps of a method 700 for delivering the D2X terrestrial broadcast services in lower UHF band, in accordance with embodiments of the present disclosure.

[0037] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in a computer readable medium and executed by a computer or processor, whether or not such computer or processor is explicitly shown.DETAILED DESCRIPTION

[0038] The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the same purposes of the present disclosure.

[0039] The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.

[0040] In the present document, the word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment or implementation of the present subject matter described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0041] While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the spirit and the scope of the disclosure.

[0042] The terms “comprise”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a device or system or apparatus proceeded by “comprises. . . a” does not, without more constraints, preclude the existence of other elements or additional elements in the device or system or apparatus.

[0043] The terms “an embodiment”, “embodiment”, “embodiments”, “the embodiment”, “the embodiments”, “one or more embodiments”, “some embodiments”, and “one embodiment” mean “one or more (but not all) embodiments of the invention(s)” unless expressly specified otherwise.

[0044] The terms “including”, “comprising”, “having” and variations thereof mean “including but not limited to” unless expressly specified otherwise.

[0045] The terms “D2X terrestrial broadcast system”, “terrestrial broadcast system”, “proposed terrestrial broadcast system” and “system” have been used interchangeably in the present disclosure.

[0046] The terms “plurality of HPHT transmitters” and “HPHT transmitters” have been used interchangeably in the present disclosure.

[0047] The terms “plurality of LPLT transmitters” and “LPLT transmitters” have been used interchangeably in the present disclosure.

[0048] The terms “hybrid network”, “proposed hybrid network” and “network” have been used interchangeably in the present disclosure.

[0049] Fig. 1A depicts an exemplary scenario (100A) illustrating the deployment of the HPHT transmitter 102 for the terrestrial broadcast services, highlighting ineffectiveness of providing indoor D2X services by purely HPHT transmission. In this context, Fig. 1 A depicts a HPHT transmitter (102), a terrestrial antenna (104) and a mobile unit (106) located indoors. In one embodiment, the mobile unit (106) is not limited to a mobile phone, and it may include a smartphone, a tablet, a laptop, a smart TV or any smart appliance among others. As already discussed, while the HPHT networks are effective for wide-area broadcasting, they may struggle with indoor penetration and mobile reception, necessitating the use of Low Power Low Tower (LPLT) transmitters to fill coverage gaps and improve service quality.

[0050] One of the primary limitations of the HPHT transmission may comprise of indoor signal attenuation. As the signals travel from high powered towers, they may experience a standard building penetration loss, which may thereby significantly reduce their strength when reaching indoor environments. The loss may occur due to walls, windows, and other obstructions that weaken or completely block the signal, leading to poor reception inside homes, offices, and commercial buildings. This may, therefore, be considered as a critical issue for D2X services, as users mainly rely onseamless indoor connectivity for video streaming, data services, and emergency alerts among other activities.

[0051] Additionally, the HPHT transmission may suffer from different channel propagation effects in outdoor when compared with indoor environments. For instance, in outdoor settings, signals may typically propagate through a Rician channel (108), where at least one strong direct signal path exists between the HPHT transmitter (102) and the terrestrial antenna (104). This may therefore, allow for relatively stable reception with minimal fading. However, in the indoor settings, the mobile unit (106) users may often experience Rayleigh fading (110), where signals scatter due to multiple reflections from buildings and objects. This may thereby result in lower signal strength, increased variability, and frequent connectivity issues, making HPHT less reliable for indoor and mobile applications.

[0052] Another major factor affecting HPHT efficiency may be antenna gain and height difference (112). HPHT networks rely on transmission from tall towers which, in one embodiment, may be 20 meters or more above ground level, to cover large areas. While this approach is effective for outdoor coverage, it may create challenges for indoor and mobile receivers, which operate closer to the ground and often use low- gain antennas. In a non -limiting exemplary scenario 100 A, Fig. 1A illustrates that while the terrestrial antenna (104) may have a 10 dBi gain, the antennas associated with the mobile unit (106) may have a negative antenna gain (for example, -10 dBi) which may further reduce their ability to capture and process the HPHT signals effectively. Therefore, to overcome these challenges, the present disclosure proposes the deployment of a hybrid network comprising a combination of LPLT transmitters (114 shown in Fig. IB) and HPHT transmitter (102) for providing D2X terrestrial broadcast services as discussed in detail in the upcoming paragraphs in conjunction with the Fig. IB.

[0053] Fig. IB depicts an exemplary hybrid network environment (100B) illustrating the deployment of a both LPLT transmitters (114) and HPHT transmitter (102) for providing D2X terrestrial broadcast services. In the Fig. IB, the hybrid network environment (100B) of HPHT transmitter (102) and LPLT transmitters (114) is depicted along with a centralized broadcast system. In one embodiment, thecentralized broadcast system may comprise of a broadcasting core and a network backhaul for distributing signals to both the HPHT transmitter (102) and the LPLT transmitters (114) but not limited thereto. In the hybrid network environment (100B) shown in Fig. IB, the LPLT transmitters (114) may act as gap fillers, ensuring that weak indoor and urban signals are reinforced without requiring excessively high transmission power from HPHT stations. Further, by placing the LPLT transmitters (114) at lower heights and within cities, they may provide a more localized, reliable signal that penetrates buildings more effectively.

[0054] In one embodiment, both the HPHT transmitter (102) and the LPLT transmitters (114) in the hybrid network environment (100B) operate in a Single Frequency Network (SFN) mode such that both the HPHT transmitter (102) and the LPLT transmitters (114) broadcast the same signal on the same frequency which may lead to minimized interference and enhanced signal quality even in challenging urban environments thereby improving service delivery to a variety of terminal devices, including both the indoor and outdoor devices. The detailed description of the proposed technique is provided in the upcoming paragraphs in conjunction with the Fig. 2-7 of the present disclosure.

[0055] Fig. 2 depicts a block diagram (200) illustrating a D2X terrestrial broadcast service system (202) (hereinafter referred as “system (202)”) for delivering the D2X terrestrial broadcast services. The D2X terrestrial broadcast service system (200) may include, without limiting to, a sophisticated hybrid network (204) that integrates both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) to ensure efficient and seamless broadcasting. The system (202)may further comprise a processing system (210). The processing system (210), in one embodiment, may be referred as the core of the system (202) as it is responsible for handling all aspects of content preparation and transmission control required for delivering the terrestrial broadcast services. The processing system (210) may further comprise a processor (212), an Input / Output (I / O) unit (214), a memory (216) and a centralized broadcast system (218). The processor (212) may be responsible for managing the execution of key broadcasting functions, while the I / O unit (214) may facilitate communication between different network elements. The memory (216), in turn, may store necessary data, which in one embodiment, may include timing information and real-timenetwork conditions to ensure that the system (202) may dynamically adapt the related operations. The centralized broadcast system (218) may play a pivotal role in processing and encoding broadcast content before distributing it to both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208).

[0056] In one embodiment, the process may begin with the configuration of the hybrid network (204), where the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) may strategically be deployed to maximize coverage while addressing urban signal penetration challenges. In one embodiment, the hybrid network (204) may be operated in the (Single Frequency Network) (SFN) mode, which means that all the transmitters — whether HPHT or LPLT — broadcast the same signal on the same frequency. The synchronization of these transmissions may be achieved using timing information, ensuring that there is no interference or signal distortion, which is crucial for maintaining high-quality reception. Once the transmission is synchronised, the processor (212), in conjunction with the centralized broadcast system (218), may process the broadcast content. The processing at the centralized broadcast system (218) may include formatting, transcoding, and performing rate matching to optimize transmission efficiency, but not limited thereto. Further, the processor (212) in conjunction with the centralized broadcast system (218) may also be responsible for selecting an appropriate modulation and coding schemes (MODCOD) dynamically i.e., based on the real-time conditions of the hybrid network (204). In one embodiment, the real-time conditions of the hybrid network (204) for determining the appropriate MODCOD scheme may be monitored via factors such as signal quality, receiver capabilities, and network congestion, but not limited thereto. The selection of the appropriate MODCOD scheme is one the crucial steps as it may play a very important role in ensuring that error correction and transmission efficiency of the hybrid network (204) are well-balanced, thereby maintaining a robust and reliable signal.

[0057] 0nce the broadcast content has been processed and encoded at the centralized broadcast system (218), the processor (212), in conjunction with the memory (216), may then be configured to distribute the encoded broadcast content from the centralized broadcast system (218) to both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) of the hybrid network (204). However,for both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) to work in tandem with each other, an effective and robust synchronization may be required, which prevents interference and ensures smooth handover between both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208). In one embodiment, to achieve the synchronization, the centralized broadcast system (218), in conjunction with the processor (212), may be configured to include timestamps before the broadcast signal is distributed to the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208).

[0058] In one embodiment, the timestamps may be referred to as the timing information which may serve as reference points for both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208), ensuring that they broadcast the signal at precisely the same moment, preventing signal overlap issues such as interference or echoes. Both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) do not generate their own timestamps; instead, they adhere to the timing instructions provided by the centralized broadcast system (218). In addition, the process of timestamping may be considered to be of more paramount importance, particularly in the SFN mode-based terrestrial broadcasting, where receivers may receive signals from multiple transmitters simultaneously. In one embodiment, these timestamps are remarkably crucial for the LPLT transmissions, as they need to be perfectly synchronized with the high power HPHT signals. Since the plurality of HPHT transmitters (206) typically cover wide areas and the plurality of LPLT transmitters (208) fill coverage gaps (especially in urban or indoor environments), proper timing coordination may prevent phase misalignment, which could otherwise degrade signal quality. Therefore, by embedding timestamps, the system (202) may allow receivers to process overlapping signals from multiple transmitters (both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208)) as a single coherent transmission, thus improving reception quality and minimizing interference effects such as echoes or delays. In another embodiment, the system (202) may incorporate time and frequency interleaving to enhance signal robustness, ensuring stable reception even in challenging propagation environments.

[0059] Further, to maintain the optimal performance of both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208), the processor (212)may further be configured to dynamically adjust various transmission parameters which may be modified based on real-time network conditions. In one embodiment, the transmission parameters may include guard intervals, timing offsets, power levels, and modulation schemes but not limited thereto. And the real-time network conditions, based on which the transmission parameters are dynamically modified may include location of the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208), network channel conditions, and environmental interference, but not limited thereto. These transmission parameters, in general, may enable the system (202) to optimize coverage, reduce interference, and enhance reception quality for the users, specifically the mobile and indoor users.

[0060] In another embodiment, the processing system (210) may also take into account the propagation characteristics of the signal transmissions from the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) while processing the broadcast signal at the centralized broadcast system (218). In one embodiment, the plurality of HPHT transmitters (206) may operate over the Rician channel (108), which provide a direct, stronger signal path with minimal scattering and the plurality of LPLT transmitters (208) may operate in Rayleigh fading channels, where signals experience significant multi-path scattering due to reflections from buildings and other structures. Therefore, by combining the varied propagation characteristics associated with the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) via the hybrid network (204), the processing system (210) may ensure that urban areas and indoor environments receive adequate signal strength, overcoming the standard penetration loss commonly associated with only HPHT transmissions in the indoor environments, as referenced in Fig. 1A of the present disclosure.

[0061] Besides the above discussed criteria, antenna configurations and polarization schemes associated with both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) may also form a crucial aspect for processing the broadcast signal at the centralized broadcast system (218) of the system (202). In one embodiment, the plurality of LPLT transmitters (208) may utilize sectorized antenna configurations thereby allowing signals to be efficiently directed toward areas with weak coverage. Furthermore, the system (202) may dynamically deploy different antenna polarization schemes based on the real-time network conditions, furtherenhancing signal reliability. These antenna configurations allow the hybrid network (204) to adapt to varying reception conditions, improving overall service quality for both fixed and mobile receivers. The detailed explanation of varied polarization schemes and their impact on the broadcast signal has been discussed in forthcoming paragraphs in conjunction with Fig. 4 of the present disclosure. In another embodiment, to further optimize efficiency, the hybrid network (204) may also be designed to integrate seamlessly with existing cellular infrastructure. This integration may allow for coordinated resource allocation and spectrum sharing, reducing deployment costs while ensuring a more effective use of available bandwidth. The ability to operate in conjunction with cellular networks may enhance the system’s (202) flexibility, making it a viable solution for delivering next-generation broadcast services, including emergency alerts, real-time video streaming, and interactive data services.

[0062] Further, the processing system (210) may also be configured to manage the frequency domain-to-time domain conversion using Inverse Fast Fourier Transform (iFFT), ensuring that the broadcast signal is correctly structured for transmission. This transformation may be essential for maintaining spectral efficiency and minimizing interference in the UHF band. The detailed explanation of the iFFT process associated with the given hybrid network (204) has been explained in the upcoming paragraphs in conjunction with Fig. 3 of the present disclosure.

[0063] Fig. 3 depicts a block diagram (300) illustrating the use of time and frequency interleaving, in the hybrid network (204), for robust reception of broadcast signals. The interleaving techniques used may ensure that the broadcast signals transmitted from both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) maintain integrity even when subjected to frequency-specific and time-specific disruptions. In particular, time interleaving is a technique that may spread data across different time slots, reducing the impact of sudden signal fades or time-dependent interference. Whereas frequency interleaving may distribute the data over multiple frequency channels, minimizing the effects of frequency-specific interference and ensuring more reliable reception. Together, these interleaving techniques may assist in mitigating interference, multipath fading, and signaldegradation while enhancing signal robustness, especially in environments with obstacles and varying network conditions.

[0064] Referring to Fig. 3 in conjunction with Fig. 4, the centralized broadcast system (218), in conjunction with the processor (212) and the memory (216), may be configured to manage the time and frequency interleaving before the encoded signal is transmitted to the hybrid network (204). The process may begin with the symbols (302) (including symbol#l 302a to symbol#N 302n) entering the processing system (210) via the I / O unit (214). In one embodiment, the symbols (302a, 302b...302n) may refer to the smallest unit of modulated data that are transmitted over the communication channel. The actual broadcast information may be stored in the symbols (302a, 302b...302n). The symbols (302a, 302b. . .302n) may then be stored in the individual memory buffers (216a, 216b, 216n) associated with the memory (216). Within the individual memory buffers (216a, 216b, 216n), the data may be read out in a scrambled sequence, which is a key part of frequency interleaving (304). This technique of frequency interleaving (304) may thereby ensure that data is spread across multiple frequencies, preventing signal degradation due to interference concentrated on specific frequency bands. The individual memory buffers (216a, 216b, 216n) may, in turn, facilitate this process by ensuring that the data is rearranged in a way that improves overall signal reliability when broadcasted through the hybrid network (204).

[0065] After the frequency interleaving (304) stage, the interleaved data is multiplexed using Time Division Multiplexing (TDM) (306). In one embodiment, the purpose of TDM (306) may be to combine the scrambled data sequences in a structured time-division manner, ensuring that different portions of the broadcast signal are allocated to different time slots. Once TDM (306) processing is complete, the data may then be stored in another set of memory buffers (308) for the next stage, that is, time interleaving (310). In this phase, the symbols (302A, 302B ...302N) may once again be read out in a scrambled order, but this time, the focus would be on spreading the data across different time slots. This process may actually be considered crucial for mitigating time-dependent interference, such as sudden signal fades or variations caused by moving objects in the transmission environment. Once the data has undergone both frequency interleaving (304) and time interleaving (310), it may be processed through an inverse Fast Fourier Transform (iFFT) (312). In oneembodiment, the role of iFFT (312) may be to convert the data from the frequency domain back into the time domain, preparing it for broadcast transmission. This transformation is essential because terrestrial broadcast systems operate in the time domain, and the iFFT (312) may thereby ensure that the interleaved data is properly formatted for transmission across the hybrid network (204).

[0066] By integrating frequency interleaving (304), TDM (306), time interleaving (310), and iFFT (312), at the centralized broadcast system (218), the processing system (210) may significantly enhance signal robustness. The combined effect of these techniques is a reduction in Bit Error Rates (BER), ensuring that receivers experience high-quality and uninterrupted broadcasts, even in challenging environments. The interleaving process may also directly support the synchronization mechanisms and timestamp embedding discussed earlier, as the modified data structure may allow for efficient transmission alignment in the SFN mode. Since the HPHT transmitter (102) typically operate over Rician fading channels, and LPLT transmitters (114) function over Rayleigh fading channels, this robust interleaving strategy may further ensure that both types of transmitters may effectively deliver content without compromising reception quality.

[0067] Furthermore, the interleaved signal structure may align with the centralized broadcast system's (218) role in encoding and distributing content across the network. As previously mentioned, the centralized broadcast system (218) synchronizes all transmissions using timestamps, ensuring that the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) broadcast the signal at the correct moment. In one embodiment, the interleaving process may further support the synchronization by spreading signal distortions across multiple frequencies and time slots, making the entire network more resilient to localized interference and signal fluctuations. As already discussed, varied polarization schemes may impact the processing of the broadcast signals. The forthcoming paragraphs discusses the various polarization schemes and their impact on the broadcast signal propagation in detail in conjunction with Fig. 4 of the present disclosure.

[0068] Fig. 4 illustrates the impact of different polarization schemes on the effectiveness of the signal propagation in the D2X terrestrial broadcast system (202). In the context of the D2X terrestrial broadcast service system (202), where both the plurality of HPHTtransmitters (206) and the plurality of LPLT transmitters (208) work in the hybrid network (204), the polarization of the transmitted electromagnetic waves may play a crucial role in determining the effectiveness of signal propagation. The Fig. 4 demonstrates how horizontal, vertical, and cross-polarization schemes may influence signal reach, coverage gaps, and reception quality across different environments respectively.

[0069] In one embodiment, graph A depicts Horizontal polarization (H) as offering an extensive reach, making it particularly suitable for rural areas where large coverage zones are required. This is because horizontally polarized waves may tend to scatter efficiently off vertical obstacles like buildings and trees, allowing for a broader signal spread. However, despite its wider reach, Horizontal polarization (H) may lead to significant gaps in coverage, as depicted in graph B, particularly in dense urban environments where multiple reflections and obstructions can weaken the signal.

[0070] In another embodiment, vertical polarization (V) is illustrated to have a higher percentage of coverage within its range, as depicted in graph A. This is due to its better penetration capabilities in cluttered environments such as cities, where high-rise buildings and dense structures cause significant signal attenuation. The enhanced ability of vertically polarized waves to navigate through such obstacles may ensure more reliable reception within urban landscapes. However, its overall reach is typically less than that of horizontal polarization, as depicted in graph B.

[0071] In yet another embodiment, graph A depicts Cross-polarization (C) scheme, which may involve a combination of +45 and -45-degree polarized signals, as an effective approach for improving signal reception, particularly in highly obstructed environments like metropolitan areas. By using both polarization planes, cross- polarization (C) scheme may thereby increase the probability of successful signal capture by receivers, mitigating the effects of multipath fading and signal blockage. In this context, graph B further highlights that, while cross-polarization (C) scheme may not achieve the maximum reach of horizontal polarization (H), it may significantly enhance signal robustness and reduces coverage gaps in dense urban scenarios. This adaptive polarization strategy, based on the real-time network conditions, may therefore ensure that the D2X terrestrial broadcast system (202) may effectivelydeliver high-quality signals across diverse geographic regions while minimizing transmission losses and coverage gaps. Another real-time network condition that may severely impact the robustness of the broadcast signal is associated with the overlapping of these signals when the D2X terrestrial broadcast system (202) is operating in the SFN mode. The detailed explanation of these challenges and the solution provided by the proposed hybrid network (204) has been discussed in detail in conjunction with Fig. 5 of the present disclosure.

[0072] FIG. 5 illustrates the challenges that arise due to the overlapping of signals in the SFN mode when the plurality of LPLT transmitters (208) is deployed within the D2X terrestrial broadcast system (202). Since in the SFN mode, all transmitters - whether the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) - broadcast on the same frequency, which allows for spectral efficiency, but it may also introduce interference challenges in the overlap regions where signals from different transmitters meet. In this regard, Fig. 5a highlights how overlapping signals from independent LPLT transmitter may create interference zones, leading to constructive or destructive signal combination. The overlaps may cause signal nulls, which degrade reception quality in affected areas. The degree of interference may depend on the relative timing offsets between transmitters, as small differences in signal arrival times may either enhance or weaken the received signal.

[0073] Further, Fig. 5b depicts the impact of sectorized antennas in LPLT deployments. In many cases, the plurality of LPLT transmitters (208) use directional antennas that radiate in specific sectors. In an exemplary embodiment, Fig. 5b illustrates these LPLT antennas arranged in a 120-degree configuration to provide optimal coverage. However, due to variations in antenna orientation and phase offsets, the effective radiation pattern may exhibit fluctuations in signal strength across different areas. The overlapping regions of these sectorized transmissions may further result in inconsistent reception quality, further complicating network planning and optimization.

[0074] To address these issues, the hybrid network (204) proposed via the D2X terrestrial broadcast system (202) may incorporate dynamic phase adjustment techniques i.e., by continuously modifying the phase relationships between the plurality of LPLTtransmitters (208), the system (202) may ensure that destructive interference patterns do not remain static, preventing prolonged signal nulls at specific locations. Instead, the notches in the radiation pattern keep on shifting over time and space, effectively dispersing the impact of interference and minimizing reception degradation in any given area. This adaptive approach may therefore ensure that signal quality remains high across the coverage region, allowing for robust and reliable broadcast delivery even in densely populated urban environments, where signal reflections and multipath effects further complicate transmission. By leveraging these dynamic adjustments, the hybrid network (204) may maintain seamless broadcast reception, providing viewers with uninterrupted service despite the inherent challenges of the SFN mode deployments. Besides, another crucial transmission parameter i.e., time offsets has also been discussed in detail in the upcoming paragraphs in conjunction with the Fig. 6 of the present disclosure.

[0075] FIG. 6 illustrates the impact of timing offsets on the reception of signals in the SFN mode and how the hybrid network (204) leverages these offsets to improve coverage and signal reliability. Although, in the SFN mode, multiple transmitters- whether the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) - broadcast the same signal on the same frequency, but when signals from different transmitters arrive at the receiver with slight time difference, these signals may interfere with each other. This interference may therefore create a pattern of constructive and destructive signal combination, leading to signal nulls and coverage gaps. Figs. 6a-6c visually represent different timing offsets between received signals (RX signals), showing how varying delay differences, in an exemplary embodiment such as 0.5 ps, 1 ps, and 3 ps, may affect the spectral notching in the frequency domain.

[0076] Further, OdB echoes, where signals from multiple transmitters arrive at the receiver with equal amplitude but slight timing mismatches, may significantly degrade the signal reception quality. These OdB echoes result in frequency-domain notches, reducing the quality of received signals. In one embodiment, by strategically introducing timing offsets between transmitters, the hybrid network (204) may effectively disperse the signal nulls caused by the overlapping signals, thereby enhancing overall signal coverage.

[0077] For instance, in one embodiment for rooftop reception using directional antennas, the application of timing offsets may help to nullify OdB echoes and maintain a clear and stable signal. In another embodiment of portable and mobile reception scenarios, where users move through different signal overlap regions, dynamic phase adjustments and timing offsets may ensure that interference patterns do not remain static. This dynamic timing offset may therefore allow consistent and high-quality broadcast reception across diverse environments, including dense urban areas, suburban locations, and rural regions.

[0078] Fig. 7 is a flowchart showing steps of a method 700 for delivering the D2X terrestrial broadcast services in lower UHF band, in accordance with embodiments of the present disclosure. The method 700 may also be described in the general context of computer executable instructions. Generally, computer executable instructions may include routines, programs, objects, components, data structures, procedures, modules, and functions, which perform specific functions or implement specific abstract data types.

[0079] The order in which the method 700 is described is not intended to be construed as a limitation, and any number of the described method blocks may be combined in any order to implement the method 700. Additionally, individual blocks may be deleted from the methods without departing from the spirit and scope of the subject matter described.

[0080] At step 702, the method 700 may include configuring a hybrid network (204) for transmitting a broadcast signal. In one non-limiting embodiment, the hybrid network (204) may comprise a plurality of HPHT transmitters (206) and a plurality of LPLT transmitters (208). In another embodiment, the processor (212) in conjunction with the memory (216) is configured to configure the hybrid network (204) for transmitting the broadcast signal.

[0081] At step 704, the method 700 may include operating the hybrid network (204) in a Single Frequency Network (SFN) mode to facilitate both the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) in broadcasting a same signal on a same frequency. In one embodiment, the processor (212) in conjunctionwith the memory (216) is configured to operate the hybrid network (204) in the SFN mode.

[0082] At step 706, the method 700 may include synchronizing transmissions across the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) using timing information. In one non-limiting embodiment, the processor (212) in conjunction with the memory (216) is configured to synchronize transmissions across the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) using timing information. In another embodiment, the processor (212) in conjunction with the centralized broadcast system (218) is further configured to synchronize transmissions across the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) using timestamps embedded into the transmissions.

[0083] At step 708, the method 700 may include processing broadcast content. In one embodiment, the processor (212) in conjunction with the centralized broadcast system (218) is configured to process the broadcast content at the centralized broadcast system (218). In another embodiment, to process the broadcast content, the processor (212) in conjunction with the centralized broadcast system (218) is further configured to format the broadcast content and then transcode the formatted broadcast content. Furthermore, a rate matching on the transcoded broadcast content is performed and then a plurality of modulation and coding schemes (MODCOD) based on the real-time network conditions is determined. Subsequently, the processor (212) is configured to select a MODCOD scheme out of the plurality of MODCOD schemes based on at least one of: signal appropriation condition, receiver capabilities and network congestion, in addition, the processor (212) then may encode the rate-matched broadcast content according to the selected MODCOD scheme by adjusting a coding rate to balance error correction capability and transmission efficiency and dynamically adapt the selected MODCOD scheme in response to the real-time network conditions.

[0084] At step 710, the method 700 may include distributing an encoded broadcast content to the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208). In one embodiment, the processor (212) in conjunction with the centralized broadcast system (218) and the I / O unit (214) is configured to distribute the encoded broadcast content to the plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208).

[0085] At step 712, the method 700 may include broadcasting the encoded broadcast content in the lower UHF band. In one embodiment, the processor (212) in conjunction with plurality of HPHT transmitters (206) and the plurality of LPLT transmitters (208) is configured to broadcast the encoded broadcast content in the lower UHF band.

[0086] At step 714, the method 700 may include dynamically adjusting a plurality of transmission parameters based on real-time network conditions for delivering the D2X terrestrial broadcast services in the lower UHF band. In one embodiment, the plurality of transmission parameters comprises modifying at least one of: guard intervals, timing offsets, power levels, and modulation schemes. In another embodiment, the processor (212) is configured to modify at least one of: guard intervals, timing offsets, power levels, and modulation schemes.

[0087] The illustrated steps are set out to explain the exemplary embodiments shown, and it should be anticipated that ongoing technological development will change the manner in which particular functions are performed. These examples are presented herein for purposes of illustration, and not limitation. Further, the boundaries of the functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternative boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. It may be noted here that the subject matter of some or all embodiments described with reference to Figures 1-6 may be relevant for the method and the same is not repeated for the sake of brevity.

[0088] Alternatives (including equivalents, extensions, variations, deviations, etc., of those described herein) will be apparent to persons skilled in the relevant art(s) based on the teachings contained herein. Such alternatives fall within the scope and spirit of the disclosed embodiments. Further, any skilled person in the art would appreciate that the reconstruction error mentioned in the foregoing paragraphs may be considered as a value that overshoots the determined threshold value and must not be construed as an error as such.

[0089] Furthermore, one or more computer-readable storage media may be utilized in implementing embodiments consistent with the present disclosure. A computer- readable storage medium refers to any type of physical memory on which informationor data readable by a processor may be stored. Thus, a computer-readable storage medium may store instructions for execution by one or more processors, including instructions for causing the processor(s) to perform steps or stages consistent with the embodiments described herein. The term “computer- readable medium” should be understood to include tangible items and exclude carrier waves and transient signals, i.e., are non-transitory. Examples include random access memory (RAM), read-only memory (ROM), volatile memory, non-volatile memory, hard drives, Compact Disc (CD) ROMs, DVDs, flash drives, disks, and any other known physical storage media.

[0090] Suitable processors include, by way of example, a general-purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a graphic processing unit (GPU), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and / or a state machine. As used herein, a phrase referring to “at least one” or “one or more” of a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c. The terms “a”, “an” and “the” mean “one or more”, unless expressly specified otherwise. Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the disclosure be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present disclosure are intended to be illustrative, but not limiting, of the scope of the disclosure, which is set forth in the appended claims.

Claims

WE CLAIM:

1. A method for delivering Direct-to-everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band, the method comprising: configuring a hybrid network for transmitting a broadcast signal, wherein the hybrid network comprises a plurality of High Power High Tower (HPHT) transmitters and a plurality of Low Power Low Tower (LPLT) transmitters; operating the hybrid network in a Single Frequency Network (SFN) mode to facilitate both the plurality of HPHT transmitters and the plurality of LPLT transmitters in broadcasting a same signal on a same frequency; synchronizing transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters using timing information; processing broadcast content at a centralized broadcast system; distributing, from the centralised broadcast system, an encoded broadcast content to the plurality of HPHT transmitters and the plurality of LPLT transmitters; broadcasting, by the plurality of HPHT transmitters and the plurality of LPLT transmitters, the encoded broadcast content in the lower UHF band; and dynamically adjusting a plurality of transmission parameters based on realtime network conditions for delivering the D2X terrestrial broadcast services in the lower UHF band.

2. The method as claimed in claim 1, wherein dynamically adjusting the plurality of transmission parameters comprises modifying at least one of: guard intervals, timing offsets, power levels, and modulation schemes.

3. The method as claimed in claim 1, wherein processing the broadcast content comprises: formatting the broadcast content; transcoding the formatted broadcast content; performing a rate matching on the transcoded broadcast content; determining a plurality of modulation and coding schemes (MODCOD) based on the real-time network conditions; selecting a MODCOD scheme out of the plurality of MODCOD schemes based on at least one of: signal appropriation condition, receiver capabilities and network congestion;encoding the rate-matched broadcast content according to the selected MODCOD scheme by adjusting a coding rate to balance error correction capability and transmission efficiency; and dynamically adapting the selected MODCOD scheme in response to the real-time network conditions.

4. The method as claimed in claim 1, wherein the real-time network conditions comprise at least one of: network channel conditions, location of the plurality of HPHT transmitters and location of the plurality of LPLT transmitters.

5. The method as claimed in claim 1 , wherein for synchronizing the transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters, the method comprises using timestamps embedded into the transmissions.

6. The method as claimed in claim 1 further comprising modifying the plurality of HPHT transmitters and the plurality of LPLT transmitters to utilize time and frequency interleaving for signal robustness.

7. The method as claimed in claim 1, wherein processing the broadcast signal comprises converting the broadcast signal from the frequency domain to the time domain using inverse Fast Fourier Transform (iFFT).

8. The method as claimed in claim 1, wherein the plurality of HPHT transmitters operate over Rician fading channels and the plurality of LPLT transmitters operate over Rayleigh fading channels.

9. The method as claimed in claim 1, wherein the plurality of LPLT transmitters use sectorized antenna configurations.

10. The method as claimed in claim 1, wherein operating the hybrid network comprises deploying different antenna polarization schemes based on the real-time network conditions.

11. The method as claimed in claim 1, wherein configuring the hybrid network comprises integrating the hybrid network with an existing cellular infrastructure.

12. A system to deliver Direct-to-everything (D2X) terrestrial broadcast services in lower Ultra High Frequency (UHF) band, the system comprising: a plurality of High Power High Tower (HPHT) transmitters; a plurality of Low Power Low Tower (LPLT) transmitters; a processor in communication with the plurality of HPHT transmitters and the plurality of LPLT transmitters; a memory in conjunction with the processor, wherein the processor is configured to: configure a hybrid network for transmitting a broadcast signal, wherein the hybrid network comprises the plurality of HPHT transmitters and the plurality of LPLT transmitters; operate the hybrid network in a Single Frequency Network (SFN) mode to facilitate both the plurality of HPHT transmitters and the plurality of LPLT transmitters in broadcasting a same signal on a same frequency; synchronize transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters using timing information; process broadcast content at a centralized broadcast system; distribute, from the centralised broadcast system, an encoded broadcast content to the plurality of HPHT transmitters and the plurality of LPLT transmitters; broadcast, by the plurality of HPHT transmitters and the plurality of LPLT transmitters, the encoded broadcast content in the lower UHF band; and dynamically adjust a plurality of transmission parameters based on real-time network conditions for delivering the D2X terrestrial broadcast services in the lower UHF band.

13. The system as claimed in claim 12, wherein to dynamically adjust the plurality of transmission parameters, the processor is configured to modify at least one of: guard intervals, timing offsets, power levels, and modulation schemes.

14. The system as claimed in claim 12, wherein to process the broadcast content, the processor is configured to: format the broadcast content;transcode the formatted broadcast content; perform a rate matching on the transcoded broadcast content; determine a plurality of modulation and coding schemes (MODCOD) based on the real-time network conditions; select a MODCOD scheme out of the plurality of MODCOD schemes based on at least one of: signal appropriation condition, receiver capabilities and network congestion; encode the rate-matched broadcast content according to the selected MODCOD scheme by adjusting a coding rate to balance error correction capability and transmission efficiency; and dynamically adapt the selected MODCOD scheme in response to the realtime network conditions.

15. The system as claimed in claim 12, wherein the real-time network conditions comprise at least one of: network channel conditions, location of the plurality of HPHT transmitters and location of the plurality of LPLT transmitters.

16. The system as claimed in claim 12, wherein the processor is configured to synchronize transmissions across the plurality of HPHT transmitters and the plurality of LPLT transmitters using timestamps embedded into the transmissions.

17. The system as claimed in claim 12, wherein the processor is further configured to modify the plurality of HPHT transmitters and the plurality of LPLT transmitters to utilize time and frequency interleaving for signal robustness.

18. The system as claimed in claim 12, wherein to process the broadcast signal, the processor is configured to convert the broadcast signal from the frequency domain to the time domain using inverse Fast Fourier Transform (iFFT).

19. The system as claimed in claim 12, wherein the plurality of HPHT transmitters operate over Rician fading channels and the plurality of LPLT transmitters operate over Rayleigh fading channels.

20. The system as claimed in claim 12, wherein the plurality of LPLT transmitters use sectorized antenna configurations.

21. The system as claimed in claim 12, wherein to operate the hybrid network, the processor is configured to deploy different antenna polarization schemes based on the real-time network conditions.

22. The system as claimed in claim 12, wherein to configure the hybrid network, the processor is configured to integrate the hybrid network with an existing cellular infrastructure.

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